gorm

package
v1.0.4 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Dec 2, 2023 License: MIT, MIT Imports: 24 Imported by: 0

README

GORM

The fantastic ORM library for Golang, aims to be developer friendly.

go report card test status MIT license Go.Dev reference

Overview

  • Full-Featured ORM
  • Associations (Has One, Has Many, Belongs To, Many To Many, Polymorphism, Single-table inheritance)
  • Hooks (Before/After Create/Save/Update/Delete/Find)
  • Eager loading with Preload, Joins
  • Transactions, Nested Transactions, Save Point, RollbackTo to Saved Point
  • Context, Prepared Statement Mode, DryRun Mode
  • Batch Insert, FindInBatches, Find To Map
  • SQL Builder, Upsert, Locking, Optimizer/Index/Comment Hints, NamedArg, Search/Update/Create with SQL Expr
  • Composite Primary Key
  • Auto Migrations
  • Logger
  • Extendable, flexible plugin API: Database Resolver (Multiple Databases, Read/Write Splitting) / Prometheus…
  • Every feature comes with tests
  • Developer Friendly

Getting Started

Contributing

You can help to deliver a better GORM, check out things you can do

Contributors

Thank you for contributing to the GORM framework!

License

© Jinzhu, 2013~time.Now

Released under the MIT License

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrRecordNotFound record not found error
	ErrRecordNotFound = logger.ErrRecordNotFound
	// ErrInvalidTransaction invalid transaction when you are trying to `Commit` or `Rollback`
	ErrInvalidTransaction = errors.New("invalid transaction")
	// ErrNotImplemented not implemented
	ErrNotImplemented = errors.New("not implemented")
	// ErrMissingWhereClause missing where clause
	ErrMissingWhereClause = errors.New("WHERE conditions required")
	// ErrUnsupportedRelation unsupported relations
	ErrUnsupportedRelation = errors.New("unsupported relations")
	// ErrPrimaryKeyRequired primary keys required
	ErrPrimaryKeyRequired = errors.New("primary key required")
	// ErrModelValueRequired model value required
	ErrModelValueRequired = errors.New("model value required")
	// ErrModelAccessibleFieldsRequired model accessible fields required
	ErrModelAccessibleFieldsRequired = errors.New("model accessible fields required")
	// ErrSubQueryRequired sub query required
	ErrSubQueryRequired = errors.New("sub query required")
	// ErrInvalidData unsupported data
	ErrInvalidData = errors.New("unsupported data")
	// ErrUnsupportedDriver unsupported driver
	ErrUnsupportedDriver = errors.New("unsupported driver")
	// ErrRegistered registered
	ErrRegistered = errors.New("registered")
	// ErrInvalidField invalid field
	ErrInvalidField = errors.New("invalid field")
	// ErrEmptySlice empty slice found
	ErrEmptySlice = errors.New("empty slice found")
	// ErrDryRunModeUnsupported dry run mode unsupported
	ErrDryRunModeUnsupported = errors.New("dry run mode unsupported")
	// ErrInvalidDB invalid db
	ErrInvalidDB = errors.New("invalid db")
	// ErrInvalidValue invalid value
	ErrInvalidValue = errors.New("invalid value, should be pointer to struct or slice")
	// ErrInvalidValueOfLength invalid values do not match length
	ErrInvalidValueOfLength = errors.New("invalid association values, length doesn't match")
	// ErrPreloadNotAllowed preload is not allowed when count is used
	ErrPreloadNotAllowed = errors.New("preload is not allowed when count is used")
	// ErrDuplicatedKey occurs when there is a unique key constraint violation
	ErrDuplicatedKey = errors.New("duplicated key not allowed")
	// ErrForeignKeyViolated occurs when there is a foreign key constraint violation
	ErrForeignKeyViolated = errors.New("violates foreign key constraint")
)

Functions

func Expr 

func Expr(expr string, args ...interface{}) clause.Expr

Expr returns clause.Expr, which can be used to pass SQL expression as params

func Scan 

func Scan(rows Rows, db *DB, mode ScanMode)

Scan scan rows into db statement

Types

type Association 

type Association struct {
	DB           *DB
	Relationship *schema.Relationship
	Unscope      bool
	Error        error
}

Association Mode contains some helper methods to handle relationship things easily.

func (*Association) Append 

func (association *Association) Append(values ...interface{}) error

func (*Association) Clear 

func (association *Association) Clear() error

func (*Association) Count 

func (association *Association) Count() (count int64)

func (*Association) Delete 

func (association *Association) Delete(values ...interface{}) error

func (*Association) Find 

func (association *Association) Find(out interface{}, conds ...interface{}) error

func (*Association) Replace 

func (association *Association) Replace(values ...interface{}) error

func (*Association) Unscoped 

func (association *Association) Unscoped() *Association

type ColumnType 

type ColumnType interface {
	Name() string
	DatabaseTypeName() string                 // varchar
	ColumnType() (columnType string, ok bool) // varchar(64)
	PrimaryKey() (isPrimaryKey bool, ok bool)
	AutoIncrement() (isAutoIncrement bool, ok bool)
	Length() (length int64, ok bool)
	DecimalSize() (precision int64, scale int64, ok bool)
	Nullable() (nullable bool, ok bool)
	Unique() (unique bool, ok bool)
	ScanType() reflect.Type
	Comment() (value string, ok bool)
	DefaultValue() (value string, ok bool)
}

ColumnType column type interface

type Config 

type Config struct {
	// GORM perform single create, update, delete operations in transactions by default to ensure database data integrity
	// You can disable it by setting `SkipDefaultTransaction` to true
	SkipDefaultTransaction bool
	// NamingStrategy tables, columns naming strategy
	NamingStrategy schema.Namer
	// FullSaveAssociations full save associations
	FullSaveAssociations bool
	// Logger
	Logger  logger.Interface
	Logger2 logger2.ILogger
	// NowFunc the function to be used when creating a new timestamp
	NowFunc func() time.Time
	// DryRun generate sql without execute
	DryRun bool
	// PrepareStmt executes the given query in cached statement
	PrepareStmt bool
	// DisableAutomaticPing
	DisableAutomaticPing bool
	// DisableForeignKeyConstraintWhenMigrating
	DisableForeignKeyConstraintWhenMigrating bool
	// IgnoreRelationshipsWhenMigrating
	IgnoreRelationshipsWhenMigrating bool
	// DisableNestedTransaction disable nested transaction
	DisableNestedTransaction bool
	// AllowGlobalUpdate allow global update
	AllowGlobalUpdate bool
	// QueryFields executes the SQL query with all fields of the table
	QueryFields bool
	// CreateBatchSize default create batch size
	CreateBatchSize int
	// TranslateError enabling error translation
	TranslateError bool

	// ClauseBuilders clause builder
	ClauseBuilders map[string]clause.ClauseBuilder
	// ConnPool db conn pool
	ConnPool ConnPool
	// Dialector database dialector
	Dialector
	// Plugins registered plugins
	Plugins map[string]Plugin

	MapperFs embed.FS
	Mapper   map[string]*DynamicModel

	SlowThreshold             time.Duration // 慢SQL阈值
	IgnoreRecordNotFoundError bool          // 是否忽略记录没有找到错误
	// contains filtered or unexported fields
}

Config GORM config

func (*Config) AfterInitialize 

func (c *Config) AfterInitialize(db *DB) error

AfterInitialize initialize plugins after db connected

func (*Config) Apply 

func (c *Config) Apply(config *Config) error

Apply update config to new config

type ConnPool 

type ConnPool interface {
	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
	ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
	QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
	QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
}

ConnPool db conns pool interface

type ConnPoolBeginner 

type ConnPoolBeginner interface {
	BeginTx(ctx context.Context, opts *sql.TxOptions) (ConnPool, error)
}

ConnPoolBeginner conn pool beginner

type DB 

type DB struct {
	*Config
	Error        error
	RowsAffected int64
	Statement    *Statement
	Mapper       map[string]*DynamicModel

	IsBuilder  bool
	IsTemplate bool
	// contains filtered or unexported fields
}

DB GORM DB definition

func Open 

func Open(dialector Dialector, opts ...Option) (db *DB, err error)

Open initialize db session based on dialector

func (*DB) AddError 

func (db *DB) AddError(err error) error

AddError add error to db

func (*DB) Alias 

func (db *DB) Alias(value string) (tx *DB)

Alias 设置别名

func (*DB) Assign 

func (db *DB) Assign(attrs ...interface{}) (tx *DB)

Assign provide attributes used in FirstOrCreate or FirstOrInit

Assign adds attributes even if the record is found. If using FirstOrCreate, this means that records will be updated even if they are found. 

// assign an email regardless of if the record is not found
db.Where(User{Name: "non_existing"}).Assign(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "non_existing", Email: "fake@fake.org"}

// assign email regardless of if record is found
db.Where(User{Name: "jinzhu"}).Assign(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "jinzhu", Age: 20, Email: "fake@fake.org"}

func (*DB) Association 

func (db *DB) Association(column string) *Association

func (*DB) Attrs 

func (db *DB) Attrs(attrs ...interface{}) (tx *DB)

Attrs provide attributes used in FirstOrCreate or FirstOrInit

Attrs only adds attributes if the record is not found. 

// assign an email if the record is not found
db.Where(User{Name: "non_existing"}).Attrs(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "non_existing", Email: "fake@fake.org"}

// assign an email if the record is not found, otherwise ignore provided email
db.Where(User{Name: "jinzhu"}).Attrs(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "jinzhu", Age: 20}

func (*DB) AutoMigrate 

func (db *DB) AutoMigrate(dst ...interface{}) error

AutoMigrate run auto migration for given models

func (*DB) Begin 

func (db *DB) Begin(opts ...*sql.TxOptions) *DB

Begin begins a transaction with any transaction options opts

func (*DB) Builder added in v1.0.1 

func (db *DB) Builder() *SqlBuilder

Builder SQL构建器

func (*DB) Callback 

func (db *DB) Callback() *callbacks

Callback returns callback manager

func (*DB) Clauses 

func (db *DB) Clauses(conds ...clause.Expression) (tx *DB)

Clauses Add clauses

This supports both standard clauses (clause.OrderBy, clause.Limit, clause.Where) and more advanced techniques like specifying lock strength and optimizer hints. See the docs for more depth. 

// add a simple limit clause
db.Clauses(clause.Limit{Limit: 1}).Find(&User{})
// tell the optimizer to use the `idx_user_name` index
db.Clauses(hints.UseIndex("idx_user_name")).Find(&User{})
// specify the lock strength to UPDATE
db.Clauses(clause.Locking{Strength: "UPDATE"}).Find(&users)

func (*DB) Commit 

func (db *DB) Commit() *DB

Commit commits the changes in a transaction

func (*DB) Connection 

func (db *DB) Connection(fc func(tx *DB) error) (err error)

Connection uses a db connection to execute an arbitrary number of commands in fc. When finished, the connection is returned to the connection pool.

func (*DB) Count 

func (db *DB) Count(count *int64) (tx *DB)

func (*DB) Create 

func (db *DB) Create(value interface{}) (tx *DB)

Create inserts value, returning the inserted data's primary key in value's id

func (*DB) CreateInBatches 

func (db *DB) CreateInBatches(value interface{}, batchSize int) (tx *DB)

CreateInBatches inserts value in batches of batchSize

func (*DB) DB 

func (db *DB) DB() (*sql.DB, error)

DB returns `*sql.DB`

func (*DB) DDelete added in v1.0.1 

func (db *DB) DDelete(sqlId string, param ...any) (tx *DB)

DDelete 获取删除模板

func (*DB) DOffset added in v1.0.1 

func (db *DB) DOffset(page, limit int) (tx *DB)

func (*DB) DQuery added in v1.0.1 

func (db *DB) DQuery(sqlId string, param ...any) (tx *DB)

DQuery 获取动态SQL的查询模板

func (*DB) DUpdate added in v1.0.1 

func (db *DB) DUpdate(sqlId string, param ...any) (tx *DB)

func (*DB) Debug 

func (db *DB) Debug() (tx *DB)

Debug start debug mode

func (*DB) Delete 

func (db *DB) Delete(value interface{}, conds ...interface{}) (tx *DB)

Delete deletes value matching given conditions. If value contains primary key it is included in the conditions. If value includes a deleted_at field, then Delete performs a soft delete instead by setting deleted_at with the current time if null.

func (*DB) Distinct 

func (db *DB) Distinct(args ...interface{}) (tx *DB)

Distinct specify distinct fields that you want querying 

// Select distinct names of users
db.Distinct("name").Find(&results)
// Select distinct name/age pairs from users
db.Distinct("name", "age").Find(&results)

func (*DB) Exec 

func (db *DB) Exec(sql string, values ...interface{}) (tx *DB)

Exec executes raw sql

func (*DB) Find 

func (db *DB) Find(dest interface{}, conds ...interface{}) (tx *DB)

Find finds all records matching given conditions conds

func (*DB) FindInBatches 

func (db *DB) FindInBatches(dest interface{}, batchSize int, fc func(tx *DB, batch int) error) *DB

FindInBatches finds all records in batches of batchSize

func (*DB) First 

func (db *DB) First(dest interface{}, conds ...interface{}) (tx *DB)

First finds the first record ordered by primary key, matching given conditions conds

func (*DB) FirstOrCreate 

func (db *DB) FirstOrCreate(dest interface{}, conds ...interface{}) (tx *DB)

FirstOrCreate finds the first matching record, otherwise if not found creates a new instance with given conds. Each conds must be a struct or map.

Using FirstOrCreate in conjunction with Assign will result in an update to the database even if the record exists. 

// assign an email if the record is not found
result := db.Where(User{Name: "non_existing"}).Attrs(User{Email: "fake@fake.org"}).FirstOrCreate(&user)
// user -> User{Name: "non_existing", Email: "fake@fake.org"}
// result.RowsAffected -> 1

// assign email regardless of if record is found
result := db.Where(User{Name: "jinzhu"}).Assign(User{Email: "fake@fake.org"}).FirstOrCreate(&user)
// user -> User{Name: "jinzhu", Age: 20, Email: "fake@fake.org"}
// result.RowsAffected -> 1

func (*DB) FirstOrInit 

func (db *DB) FirstOrInit(dest interface{}, conds ...interface{}) (tx *DB)

FirstOrInit finds the first matching record, otherwise if not found initializes a new instance with given conds. Each conds must be a struct or map.

FirstOrInit never modifies the database. It is often used with Assign and Attrs. 

// assign an email if the record is not found
db.Where(User{Name: "non_existing"}).Attrs(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "non_existing", Email: "fake@fake.org"}

// assign email regardless of if record is found
db.Where(User{Name: "jinzhu"}).Assign(User{Email: "fake@fake.org"}).FirstOrInit(&user)
// user -> User{Name: "jinzhu", Age: 20, Email: "fake@fake.org"}

func (*DB) Get 

func (db *DB) Get(key string) (interface{}, bool)

Get get value with key from current db instance's context

func (*DB) Group 

func (db *DB) Group(name string) (tx *DB)

Group specify the group method on the find 

// Select the sum age of users with given names
db.Model(&User{}).Select("name, sum(age) as total").Group("name").Find(&results)

func (*DB) Having 

func (db *DB) Having(query interface{}, args ...interface{}) (tx *DB)

Having specify HAVING conditions for GROUP BY 

// Select the sum age of users with name jinzhu
db.Model(&User{}).Select("name, sum(age) as total").Group("name").Having("name = ?", "jinzhu").Find(&result)

func (*DB) InnerJoins 

func (db *DB) InnerJoins(query string, args ...interface{}) (tx *DB)

InnerJoins specify inner joins conditions db.InnerJoins("Account").Find(&user)

func (*DB) InstanceGet 

func (db *DB) InstanceGet(key string) (interface{}, bool)

InstanceGet get value with key from current db instance's context

func (*DB) InstanceSet 

func (db *DB) InstanceSet(key string, value interface{}) *DB

InstanceSet store value with key into current db instance's context

func (*DB) Joins 

func (db *DB) Joins(query string, args ...interface{}) (tx *DB)

Joins specify Joins conditions 

db.Joins("Account").Find(&user)
db.Joins("JOIN emails ON emails.user_id = users.id AND emails.email = ?", "jinzhu@example.org").Find(&user)
db.Joins("Account", DB.Select("id").Where("user_id = users.id AND name = ?", "someName").Model(&Account{}))

func (*DB) Last 

func (db *DB) Last(dest interface{}, conds ...interface{}) (tx *DB)

Last finds the last record ordered by primary key, matching given conditions conds

func (*DB) Limit 

func (db *DB) Limit(limit int) (tx *DB)

Limit specify the number of records to be retrieved

Limit conditions can be cancelled by using `Limit(-1)`. 

// retrieve 3 users
db.Limit(3).Find(&users)
// retrieve 3 users into users1, and all users into users2
db.Limit(3).Find(&users1).Limit(-1).Find(&users2)

func (*DB) Mappers 

func (db *DB) Mappers(name string) (tx *DB)

Mappers SQL模板

func (*DB) Migrator 

func (db *DB) Migrator() Migrator

Migrator returns migrator

func (*DB) Model 

func (db *DB) Model(value interface{}) (tx *DB)

Model specify the model you would like to run db operations 

// update all users's name to `hello`
db.Model(&User{}).Update("name", "hello")
// if user's primary key is non-blank, will use it as condition, then will only update that user's name to `hello`
db.Model(&user).Update("name", "hello")

func (*DB) Namespace added in v1.0.1 

func (db *DB) Namespace(name string) (tx *DB)

Namespace SQL模板

func (*DB) Not 

func (db *DB) Not(query interface{}, args ...interface{}) (tx *DB)

Not add NOT conditions

Not works similarly to where, and has the same syntax. 

// Find the first user with name not equal to jinzhu
db.Not("name = ?", "jinzhu").First(&user)

func (*DB) Offset 

func (db *DB) Offset(offset int) (tx *DB)

Offset specify the number of records to skip before starting to return the records

Offset conditions can be cancelled by using `Offset(-1)`. 

// select the third user
db.Offset(2).First(&user)
// select the first user by cancelling an earlier chained offset
db.Offset(5).Offset(-1).First(&user)

func (*DB) Omit 

func (db *DB) Omit(columns ...string) (tx *DB)

Omit specify fields that you want to ignore when creating, updating and querying

func (*DB) Or 

func (db *DB) Or(query interface{}, args ...interface{}) (tx *DB)

Or add OR conditions

Or is used to chain together queries with an OR. 

// Find the first user with name equal to jinzhu or john
db.Where("name = ?", "jinzhu").Or("name = ?", "john").First(&user)

func (*DB) Order 

func (db *DB) Order(value interface{}) (tx *DB)

Order specify order when retrieving records from database 

db.Order("name DESC")
db.Order(clause.OrderByColumn{Column: clause.Column{Name: "name"}, Desc: true})

func (*DB) Pluck 

func (db *DB) Pluck(column string, dest interface{}) (tx *DB)

Pluck queries a single column from a model, returning in the slice dest. E.g.: 

var ages []int64
db.Model(&users).Pluck("age", &ages)

func (*DB) Preload 

func (db *DB) Preload(query string, args ...interface{}) (tx *DB)

Preload preload associations with given conditions 

// get all users, and preload all non-cancelled orders
db.Preload("Orders", "state NOT IN (?)", "cancelled").Find(&users)

func (*DB) Raw 

func (db *DB) Raw(sql string, values ...interface{}) (tx *DB)

func (*DB) Rollback 

func (db *DB) Rollback() *DB

Rollback rollbacks the changes in a transaction

func (*DB) RollbackTo 

func (db *DB) RollbackTo(name string) *DB

func (*DB) Row 

func (db *DB) Row() *sql.Row

func (*DB) Rows 

func (db *DB) Rows() (*sql.Rows, error)

func (*DB) Save 

func (db *DB) Save(value interface{}) (tx *DB)

Save updates value in database. If value doesn't contain a matching primary key, value is inserted.

func (*DB) SavePoint 

func (db *DB) SavePoint(name string) *DB

func (*DB) Scan 

func (db *DB) Scan(dest interface{}) (tx *DB)

Scan scans selected value to the struct dest

func (*DB) ScanRows 

func (db *DB) ScanRows(rows *sql.Rows, dest interface{}) error

func (*DB) Scopes 

func (db *DB) Scopes(funcs ...func(*DB) *DB) (tx *DB)

Scopes pass current database connection to arguments `func(DB) DB`, which could be used to add conditions dynamically 

func AmountGreaterThan1000(db *gorm.DB) *gorm.DB {
    return db.Where("amount > ?", 1000)
}

func OrderStatus(status []string) func (db *gorm.DB) *gorm.DB {
    return func (db *gorm.DB) *gorm.DB {
        return db.Scopes(AmountGreaterThan1000).Where("status in (?)", status)
    }
}

db.Scopes(AmountGreaterThan1000, OrderStatus([]string{"paid", "shipped"})).Find(&orders)

func (*DB) Select 

func (db *DB) Select(query interface{}, args ...interface{}) (tx *DB)

Select specify fields that you want when querying, creating, updating

Use Select when you only want a subset of the fields. By default, GORM will select all fields. Select accepts both string arguments and arrays. 

// Select name and age of user using multiple arguments
db.Select("name", "age").Find(&users)
// Select name and age of user using an array
db.Select([]string{"name", "age"}).Find(&users)

func (*DB) Session 

func (db *DB) Session(config *Session) *DB

Session create new db session

func (*DB) Set 

func (db *DB) Set(key string, value interface{}) *DB

Set store value with key into current db instance's context

func (*DB) SetupJoinTable 

func (db *DB) SetupJoinTable(model interface{}, field string, joinTable interface{}) error

SetupJoinTable setup join table schema

func (*DB) TDelete added in v1.0.1 

func (db *DB) TDelete() (tx *DB)

func (*DB) TPage added in v1.0.1 

func (db *DB) TPage(value any, total *int64) (tx *DB)

TPage 分页查询

func (*DB) TSelect added in v1.0.1 

func (db *DB) TSelect(value any) (tx *DB)

func (*DB) TUpdate added in v1.0.1 

func (db *DB) TUpdate(value any) (tx *DB)

func (*DB) Table 

func (db *DB) Table(name string, args ...interface{}) (tx *DB)

Table specify the table you would like to run db operations 

// Get a user
db.Table("users").Take(&result)

func (*DB) Take 

func (db *DB) Take(dest interface{}, conds ...interface{}) (tx *DB)

Take finds the first record returned by the database in no specified order, matching given conditions conds

func (*DB) Template 

func (db *DB) Template(sqlId string, param ...any) (tx *DB)

func (*DB) ToSQL 

func (db *DB) ToSQL(queryFn func(tx *DB) *DB) string

ToSQL for generate SQL string. 

db.ToSQL(func(tx *gorm.DB) *gorm.DB {
		return tx.Model(&User{}).Where(&User{Name: "foo", Age: 20})
			.Limit(10).Offset(5)
			.Order("name ASC")
			.First(&User{})
})

func (*DB) Transaction 

func (db *DB) Transaction(fc func(tx *DB) error, opts ...*sql.TxOptions) (err error)

Transaction start a transaction as a block, return error will rollback, otherwise to commit. Transaction executes an arbitrary number of commands in fc within a transaction. On success the changes are committed; if an error occurs they are rolled back.

func (*DB) Unscoped 

func (db *DB) Unscoped() (tx *DB)

func (*DB) Update 

func (db *DB) Update(column string, value interface{}) (tx *DB)

Update updates column with value using callbacks. Reference: https://gorm.io/docs/update.html#Update-Changed-Fields

func (*DB) UpdateColumn 

func (db *DB) UpdateColumn(column string, value interface{}) (tx *DB)

func (*DB) UpdateColumns 

func (db *DB) UpdateColumns(values interface{}) (tx *DB)

func (*DB) Updates 

func (db *DB) Updates(values interface{}) (tx *DB)

Updates updates attributes using callbacks. values must be a struct or map. Reference: https://gorm.io/docs/update.html#Update-Changed-Fields

func (*DB) Use 

func (db *DB) Use(plugin Plugin) error

Use use plugin

func (*DB) Where 

func (db *DB) Where(query interface{}, args ...interface{}) (tx *DB)

Where add conditions

See the docs for details on the various formats that where clauses can take. By default, where clauses chain with AND. 

// Find the first user with name jinzhu
db.Where("name = ?", "jinzhu").First(&user)
// Find the first user with name jinzhu and age 20
db.Where(&User{Name: "jinzhu", Age: 20}).First(&user)
// Find the first user with name jinzhu and age not equal to 20
db.Where("name = ?", "jinzhu").Where("age <> ?", "20").First(&user)

func (*DB) WithContext 

func (db *DB) WithContext(ctx context.Context) *DB

WithContext change current instance db's context to ctx

type DeleteDom added in v1.0.1 

type DeleteDom struct {
	Name   xml.Name `xml:"delete"`
	Id     string   `xml:"id,attr"`
	Param  string   `xml:"param,attr"`
	Result string   `xml:"result,attr"`
	Value  string   `xml:",innerxml"`
}

DeleteDom 删除

type DeletedAt 

type DeletedAt sql.NullTime

func (DeletedAt) DeleteClauses 

func (DeletedAt) DeleteClauses(f *schema.Field) []clause.Interface

func (DeletedAt) MarshalJSON 

func (n DeletedAt) MarshalJSON() ([]byte, error)

func (DeletedAt) QueryClauses 

func (DeletedAt) QueryClauses(f *schema.Field) []clause.Interface

func (*DeletedAt) Scan 

func (n *DeletedAt) Scan(value interface{}) error

Scan implements the Scanner interface.

func (*DeletedAt) UnmarshalJSON 

func (n *DeletedAt) UnmarshalJSON(b []byte) error

func (DeletedAt) UpdateClauses 

func (DeletedAt) UpdateClauses(f *schema.Field) []clause.Interface

func (DeletedAt) Value 

func (n DeletedAt) Value() (driver.Value, error)

Value implements the driver Valuer interface.

type Dialector 

type Dialector interface {
	Name() string
	Initialize(*DB) error
	Migrator(db *DB) Migrator
	DataTypeOf(*schema.Field) string
	DefaultValueOf(*schema.Field) clause.Expression
	BindVarTo(writer clause.Writer, stmt *Statement, v interface{})
	QuoteTo(clause.Writer, string)
	Explain(sql string, vars ...interface{}) string
}

Dialector GORM database dialector

type DynamicItem added in v1.0.1 

type DynamicItem = map[string]*DynamicNode

type DynamicModel added in v1.0.1 

type DynamicModel struct {
	TableName string // 表名
	Nodes     map[DynamicType]DynamicItem
}

DynamicModel mapper模型

func DynamicParser added in v1.0.1 

func DynamicParser(file fs.File, log logger.ILogger) (*DynamicModel, error)

type DynamicNode added in v1.0.1 

type DynamicNode struct {
	Id         string          // SQL名称
	Content    string          // SQL内容
	ParamName  string          // 参数类型名称
	QueryName  string          // 查询参数
	ResultName string          // 返回类型名称
	Param      any             // 参数内容
	Query      any             // 查询参数
	Tpl        *pongo.Template // 模板
	Offset     int
	Limit      int
}

DynamicNode SQL模型

func (*DynamicNode) Build added in v1.0.1 

func (d *DynamicNode) Build() (string, []any, error)

Build 解析动态模板

type DynamicType added in v1.0.1 

type DynamicType int

DynamicType 动态模型类型 

const (
	Select DynamicType = iota
	Update
	Delete
	Insert
)

type ErrorTranslator 

type ErrorTranslator interface {
	Translate(err error) error
}

type GetDBConnector 

type GetDBConnector interface {
	GetDBConn() (*sql.DB, error)
}

GetDBConnector SQL db connector

type GetDBConnectorWithContext 

type GetDBConnectorWithContext interface {
	GetDBConnWithContext(db *DB) (*sql.DB, error)
}

GetDBConnectorWithContext represents SQL db connector which takes into account the current database context

type IPage 

type IPage struct {
	Page  int
	Size  int
	Total int64
	Data  any
}

type Index 

type Index interface {
	Table() string
	Name() string
	Columns() []string
	PrimaryKey() (isPrimaryKey bool, ok bool)
	Unique() (unique bool, ok bool)
	Option() string
}

type InsertDom added in v1.0.1 

type InsertDom struct {
	Name   xml.Name `xml:"insert"`
	Id     string   `xml:"id,attr"`
	Param  string   `xml:"param,attr"`
	Result string   `xml:"result,attr"`
	Value  string   `xml:",innerxml"`
}

InsertDom 插入

type Migrator 

type Migrator interface {
	// AutoMigrate
	AutoMigrate(dst ...interface{}) error

	// Database
	CurrentDatabase() string
	FullDataTypeOf(*schema.Field) clause.Expr
	GetTypeAliases(databaseTypeName string) []string

	// Tables
	CreateTable(dst ...interface{}) error
	DropTable(dst ...interface{}) error
	HasTable(dst interface{}) bool
	RenameTable(oldName, newName interface{}) error
	GetTables() (tableList []string, err error)
	TableType(dst interface{}) (TableType, error)

	// Columns
	AddColumn(dst interface{}, field string) error
	DropColumn(dst interface{}, field string) error
	AlterColumn(dst interface{}, field string) error
	MigrateColumn(dst interface{}, field *schema.Field, columnType ColumnType) error
	HasColumn(dst interface{}, field string) bool
	RenameColumn(dst interface{}, oldName, field string) error
	ColumnTypes(dst interface{}) ([]ColumnType, error)

	// Views
	CreateView(name string, option ViewOption) error
	DropView(name string) error

	// Constraints
	CreateConstraint(dst interface{}, name string) error
	DropConstraint(dst interface{}, name string) error
	HasConstraint(dst interface{}, name string) bool

	// Indexes
	CreateIndex(dst interface{}, name string) error
	DropIndex(dst interface{}, name string) error
	HasIndex(dst interface{}, name string) bool
	RenameIndex(dst interface{}, oldName, newName string) error
	GetIndexes(dst interface{}) ([]Index, error)
}

Migrator migrator interface

type Model 

type Model struct {
	ID        uint `gorm:"primarykey"`
	CreatedAt time.Time
	UpdatedAt time.Time
	DeletedAt DeletedAt `gorm:"index"`
}

Model a basic GoLang struct which includes the following fields: ID, CreatedAt, UpdatedAt, DeletedAt It may be embedded into your model or you may build your own model without it 

type User struct {
  gorm.Model
}

type Option 

type Option interface {
	Apply(*Config) error
	AfterInitialize(*DB) error
}

Option gorm option interface

type ParamsFilter 

type ParamsFilter interface {
	ParamsFilter(ctx context.Context, sql string, params ...interface{}) (string, []interface{})
}

type Plugin 

type Plugin interface {
	Name() string
	Initialize(*DB) error
}

Plugin GORM plugin interface

type PreparedStmtDB 

type PreparedStmtDB struct {
	Stmts       map[string]*Stmt
	PreparedSQL []string
	Mux         *sync.RWMutex
	ConnPool
}

func NewPreparedStmtDB 

func NewPreparedStmtDB(connPool ConnPool) *PreparedStmtDB

func (*PreparedStmtDB) BeginTx 

func (db *PreparedStmtDB) BeginTx(ctx context.Context, opt *sql.TxOptions) (ConnPool, error)

func (*PreparedStmtDB) Close 

func (db *PreparedStmtDB) Close()

func (*PreparedStmtDB) ExecContext 

func (db *PreparedStmtDB) ExecContext(ctx context.Context, query string, args ...interface{}) (result sql.Result, err error)

func (*PreparedStmtDB) GetDBConn 

func (db *PreparedStmtDB) GetDBConn() (*sql.DB, error)

func (*PreparedStmtDB) QueryContext 

func (db *PreparedStmtDB) QueryContext(ctx context.Context, query string, args ...interface{}) (rows *sql.Rows, err error)

func (*PreparedStmtDB) QueryRowContext 

func (db *PreparedStmtDB) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row

func (*PreparedStmtDB) Reset 

func (db *PreparedStmtDB) Reset()

type PreparedStmtTX 

type PreparedStmtTX struct {
	Tx
	PreparedStmtDB *PreparedStmtDB
}

func (*PreparedStmtTX) Commit 

func (tx *PreparedStmtTX) Commit() error

func (*PreparedStmtTX) ExecContext 

func (tx *PreparedStmtTX) ExecContext(ctx context.Context, query string, args ...interface{}) (result sql.Result, err error)

func (*PreparedStmtTX) QueryContext 

func (tx *PreparedStmtTX) QueryContext(ctx context.Context, query string, args ...interface{}) (rows *sql.Rows, err error)

func (*PreparedStmtTX) QueryRowContext 

func (tx *PreparedStmtTX) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row

func (*PreparedStmtTX) Rollback 

func (tx *PreparedStmtTX) Rollback() error

type Rows 

type Rows interface {
	Columns() ([]string, error)
	ColumnTypes() ([]*sql.ColumnType, error)
	Next() bool
	Scan(dest ...interface{}) error
	Err() error
	Close() error
}

Rows rows interface

type SavePointerDialectorInterface 

type SavePointerDialectorInterface interface {
	SavePoint(tx *DB, name string) error
	RollbackTo(tx *DB, name string) error
}

SavePointerDialectorInterface save pointer interface

type ScanMode 

type ScanMode uint8

ScanMode scan data mode 

const (
	ScanInitialized         ScanMode = 1 << 0 // 1
	ScanUpdate              ScanMode = 1 << 1 // 2
	ScanOnConflictDoNothing ScanMode = 1 << 2 // 4
)

scan modes

type SelectDom added in v1.0.1 

type SelectDom struct {
	Name   xml.Name `xml:"select"`
	Id     string   `xml:"id,attr"`
	Param  string   `xml:"param,attr"`
	Result string   `xml:"result,attr"`
	Value  string   `xml:",innerxml"`
}

SelectDom 查询

type Session 

type Session struct {
	DryRun                   bool
	PrepareStmt              bool
	NewDB                    bool
	Initialized              bool
	SkipHooks                bool
	SkipDefaultTransaction   bool
	DisableNestedTransaction bool
	AllowGlobalUpdate        bool
	FullSaveAssociations     bool
	QueryFields              bool
	Context                  context.Context
	Logger                   logger.Interface
	NowFunc                  func() time.Time
	CreateBatchSize          int
}

Session session config when create session with Session() method

type SoftDeleteDeleteClause 

type SoftDeleteDeleteClause struct {
	ZeroValue sql.NullString
	Field     *schema.Field
}

func (SoftDeleteDeleteClause) Build 

func (sd SoftDeleteDeleteClause) Build(clause.Builder)

func (SoftDeleteDeleteClause) MergeClause 

func (sd SoftDeleteDeleteClause) MergeClause(*clause.Clause)

func (SoftDeleteDeleteClause) ModifyStatement 

func (sd SoftDeleteDeleteClause) ModifyStatement(stmt *Statement)

func (SoftDeleteDeleteClause) Name 

func (sd SoftDeleteDeleteClause) Name() string

type SoftDeleteQueryClause 

type SoftDeleteQueryClause struct {
	ZeroValue sql.NullString
	Field     *schema.Field
}

func (SoftDeleteQueryClause) Build 

func (sd SoftDeleteQueryClause) Build(clause.Builder)

func (SoftDeleteQueryClause) MergeClause 

func (sd SoftDeleteQueryClause) MergeClause(*clause.Clause)

func (SoftDeleteQueryClause) ModifyStatement 

func (sd SoftDeleteQueryClause) ModifyStatement(stmt *Statement)

func (SoftDeleteQueryClause) Name 

func (sd SoftDeleteQueryClause) Name() string

type SoftDeleteUpdateClause 

type SoftDeleteUpdateClause struct {
	ZeroValue sql.NullString
	Field     *schema.Field
}

func (SoftDeleteUpdateClause) Build 

func (sd SoftDeleteUpdateClause) Build(clause.Builder)

func (SoftDeleteUpdateClause) MergeClause 

func (sd SoftDeleteUpdateClause) MergeClause(*clause.Clause)

func (SoftDeleteUpdateClause) ModifyStatement 

func (sd SoftDeleteUpdateClause) ModifyStatement(stmt *Statement)

func (SoftDeleteUpdateClause) Name 

func (sd SoftDeleteUpdateClause) Name() string

type SqlBuilder added in v1.0.1 

type SqlBuilder struct {
	// contains filtered or unexported fields
}

SqlBuilder SQL构建器

func NewBuilder added in v1.0.1 

func NewBuilder() *SqlBuilder

func (*SqlBuilder) DExecute added in v1.0.2 

func (s *SqlBuilder) DExecute() (tx *DB)

func (*SqlBuilder) Delete added in v1.0.2 

func (s *SqlBuilder) Delete() *SqlBuilder

func (*SqlBuilder) From added in v1.0.1 

func (s *SqlBuilder) From(tableName string, alias ...string) *SqlBuilder

From 查询的表

func (*SqlBuilder) FromQuery added in v1.0.1 

func (s *SqlBuilder) FromQuery(handler func(query *SqlBuilder), alias string) *SqlBuilder

FromQuery 子查询构建

func (*SqlBuilder) GroupBy added in v1.0.1 

func (s *SqlBuilder) GroupBy(fieldName string) *SqlBuilder

func (*SqlBuilder) IJoin added in v1.0.1 

func (s *SqlBuilder) IJoin(tableName, on string) *SqlBuilder

func (*SqlBuilder) LJoin added in v1.0.1 

func (s *SqlBuilder) LJoin(tableName, on string) *SqlBuilder

func (*SqlBuilder) Limit added in v1.0.1 

func (s *SqlBuilder) Limit(limit int64) *SqlBuilder

func (*SqlBuilder) Offset added in v1.0.1 

func (s *SqlBuilder) Offset(offset int64) *SqlBuilder

func (*SqlBuilder) OrderBy added in v1.0.1 

func (s *SqlBuilder) OrderBy(query ...*SqlToken) *SqlBuilder

func (*SqlBuilder) QExecute added in v1.0.2 

func (s *SqlBuilder) QExecute(value any) (tx *DB)

func (*SqlBuilder) RJoin added in v1.0.1 

func (s *SqlBuilder) RJoin(tableName, on string) *SqlBuilder

func (*SqlBuilder) Select added in v1.0.1 

func (s *SqlBuilder) Select(fields ...*SqlToken) *SqlBuilder

Select Select部分

func (*SqlBuilder) Set added in v1.0.2 

func (s *SqlBuilder) Set(fields ...*SqlToken) *SqlBuilder

func (*SqlBuilder) Table added in v1.0.2 

func (s *SqlBuilder) Table(tableName string, alias ...string) *SqlBuilder

func (*SqlBuilder) ToSql added in v1.0.1 

func (s *SqlBuilder) ToSql() (*DB, string, []any)

func (*SqlBuilder) UExecute added in v1.0.2 

func (s *SqlBuilder) UExecute() (tx *DB)

func (*SqlBuilder) Union added in v1.0.1 

func (s *SqlBuilder) Union(query func(builder *SqlBuilder)) *SqlBuilder

func (*SqlBuilder) UnionAll added in v1.0.1 

func (s *SqlBuilder) UnionAll(query func(builder *SqlBuilder)) *SqlBuilder

func (*SqlBuilder) Update added in v1.0.2 

func (s *SqlBuilder) Update() *SqlBuilder

func (*SqlBuilder) Where added in v1.0.1 

func (s *SqlBuilder) Where(query ...*SqlToken) *SqlBuilder

Where 条件构建

func (*SqlBuilder) WhereOr added in v1.0.1 

func (s *SqlBuilder) WhereOr(query ...*SqlToken) *SqlBuilder

WhereOr 条件构建

type SqlToken added in v1.0.1 

type SqlToken struct {
	// contains filtered or unexported fields
}

SqlToken SQL token构建器

func And added in v1.0.1 

func And(query ...SqlToken) *SqlToken

And 与

func Asc added in v1.0.1 

func Asc(field string) *SqlToken

Asc 升序

func Between added in v1.0.1 

func Between(field string, value1, value2 any) *SqlToken

Between Between查询

func Count added in v1.0.1 

func Count(name string) *SqlToken

func Desc added in v1.0.1 

func Desc(field string) *SqlToken

Desc 降序

func Eq added in v1.0.1 

func Eq(field string, value any) *SqlToken

func Field added in v1.0.1 

func Field(name string, alias ...string) *SqlToken

func Gt added in v1.0.1 

func Gt(field string, value any) *SqlToken

func Gte added in v1.0.1 

func Gte(field string, value any) *SqlToken

func In added in v1.0.1 

func In(field string, values ...any) *SqlToken

In In查询

func LLike added in v1.0.1 

func LLike(field string, value string) *SqlToken

LLike 左模糊查询

func Like added in v1.0.1 

func Like(field string, value string) *SqlToken

Like 左右模糊查询

func Lt added in v1.0.1 

func Lt(field string, value any) *SqlToken

func Lte added in v1.0.1 

func Lte(field string, value any) *SqlToken

func Max added in v1.0.1 

func Max(name string) *SqlToken

func Min added in v1.0.1 

func Min(name string) *SqlToken

func NotIn added in v1.0.1 

func NotIn(field string, values ...any) *SqlToken

NotIn 非In查询

func NotNull added in v1.0.1 

func NotNull(field string) *SqlToken

NotNull 非空值查询

func Nq added in v1.0.1 

func Nq(field string, value any) *SqlToken

func Null added in v1.0.1 

func Null(field string) *SqlToken

Null 空值查询

func Or added in v1.0.1 

func Or(query ...*SqlToken) *SqlToken

Or 或

func RLike added in v1.0.1 

func RLike(field string, value string) *SqlToken

RLike 右模糊查询

func SetField added in v1.0.2 

func SetField(fieldName string, value any) *SqlToken

func (*SqlToken) Token added in v1.0.1 

func (s *SqlToken) Token() (string, []any)

type Statement 

type Statement struct {
	*DB
	TableExpr            *clause.Expr
	Table                string
	Alias                string        // 表的别名
	Mapper               *DynamicModel // 模版映射
	MapperItem           *DynamicNode  // 模版映射
	Model                interface{}
	Unscoped             bool
	Dest                 interface{}
	ReflectValue         reflect.Value
	Clauses              map[string]clause.Clause
	BuildClauses         []string
	Distinct             bool
	Selects              []string // selected columns
	Omits                []string // omit columns
	Joins                []join
	Preloads             map[string][]interface{}
	Settings             sync.Map
	ConnPool             ConnPool
	Schema               *schema.Schema
	Context              context.Context
	RaiseErrorOnNotFound bool
	SkipHooks            bool
	SQL                  strings.Builder
	Vars                 []interface{}
	CurDestIndex         int
	// contains filtered or unexported fields
}

Statement statement

func (*Statement) AddClause 

func (stmt *Statement) AddClause(v clause.Interface)

AddClause add clause

func (*Statement) AddClauseIfNotExists 

func (stmt *Statement) AddClauseIfNotExists(v clause.Interface)

AddClauseIfNotExists add clause if not exists

func (*Statement) AddVar 

func (stmt *Statement) AddVar(writer clause.Writer, vars ...interface{})

AddVar add var

func (*Statement) Build 

func (stmt *Statement) Build(clauses ...string)

Build build sql with clauses names

func (*Statement) BuildCondition 

func (stmt *Statement) BuildCondition(query interface{}, args ...interface{}) []clause.Expression

BuildCondition build condition

func (*Statement) Changed 

func (stmt *Statement) Changed(fields ...string) bool

Changed check model changed or not when updating

func (*Statement) Parse 

func (stmt *Statement) Parse(value interface{}) (err error)

func (*Statement) ParseWithSpecialTableName 

func (stmt *Statement) ParseWithSpecialTableName(value interface{}, specialTableName string) (err error)

func (*Statement) Quote 

func (stmt *Statement) Quote(field interface{}) string

Quote returns quoted value

func (*Statement) QuoteTo 

func (stmt *Statement) QuoteTo(writer clause.Writer, field interface{})

QuoteTo write quoted value to writer

func (*Statement) SelectAndOmitColumns 

func (stmt *Statement) SelectAndOmitColumns(requireCreate, requireUpdate bool) (map[string]bool, bool)

SelectAndOmitColumns get select and omit columns, select -> true, omit -> false

func (*Statement) SetColumn 

func (stmt *Statement) SetColumn(name string, value interface{}, fromCallbacks ...bool)

SetColumn set column's value 

stmt.SetColumn("Name", "jinzhu") // Hooks Method
stmt.SetColumn("Name", "jinzhu", true) // Callbacks Method

func (*Statement) WriteByte 

func (stmt *Statement) WriteByte(c byte) error

WriteByte write byte

func (*Statement) WriteQuoted 

func (stmt *Statement) WriteQuoted(value interface{})

WriteQuoted write quoted value

func (*Statement) WriteString 

func (stmt *Statement) WriteString(str string) (int, error)

WriteString write string

type StatementModifier 

type StatementModifier interface {
	ModifyStatement(*Statement)
}

StatementModifier statement modifier interface

type Stmt 

type Stmt struct {
	*sql.Stmt
	Transaction bool
	// contains filtered or unexported fields
}

type TableType 

type TableType interface {
	Schema() string
	Name() string
	Type() string
	Comment() (comment string, ok bool)
}

TableType table type interface

type Tx 

type Tx interface {
	ConnPool
	TxCommitter
	StmtContext(ctx context.Context, stmt *sql.Stmt) *sql.Stmt
}

Tx sql.Tx interface

type TxBeginner 

type TxBeginner interface {
	BeginTx(ctx context.Context, opts *sql.TxOptions) (*sql.Tx, error)
}

TxBeginner tx beginner

type TxCommitter 

type TxCommitter interface {
	Commit() error
	Rollback() error
}

TxCommitter tx committer

type UpdateDom added in v1.0.1 

type UpdateDom struct {
	Name   xml.Name `xml:"update"`
	Id     string   `xml:"id,attr"`
	Param  string   `xml:"param,attr"`
	Query  string   `xml:"query,attr"`
	Result string   `xml:"result,attr"`
	Value  string   `xml:",innerxml"`
}

UpdateDom 更新

type Valuer 

type Valuer interface {
	GormValue(context.Context, *DB) clause.Expr
}

Valuer gorm valuer interface

type ViewOption 

type ViewOption struct {
	Replace     bool   // If true, exec `CREATE`. If false, exec `CREATE OR REPLACE`
	CheckOption string // optional. e.g. `WITH [ CASCADED | LOCAL ] CHECK OPTION`
	Query       *DB    // required subquery.
}

ViewOption view option

type XmlRootDom added in v1.0.1 

type XmlRootDom struct {
	Name      xml.Name    `xml:"mapper"`
	Namespace string      `xml:"namespace,attr"`
	Selects   []SelectDom `xml:"select"`
	Updates   []UpdateDom `xml:"update"`
	Inserts   []InsertDom `xml:"insert"`
	Deletes   []DeleteDom `xml:"delete"`
}

XmlRootDom 对应一个实体的查询模型

Source Files

View all Source files

Directories

Path Synopsis
driver
mysql
postgres
sqlite
tests

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.