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Types

type Annotation

type Annotation struct {
	// The Table option allows overriding the default table
	// name that is generated by ent. For example:
	//
	//	entsql.Annotation{
	//		Table: "Users",
	//	}
	//
	Table string `json:"table,omitempty"`

	// Charset defines the character-set of the table. For example:
	//
	//	entsql.Annotation{
	//		Charset: "utf8mb4",
	//	}
	//
	Charset string `json:"charset,omitempty"`

	// Collation defines the collation of the table (a set of rules for comparing
	// characters in a character set). For example:
	//
	//	entsql.Annotation{
	//		Collation: "utf8mb4_bin",
	//	}
	//
	Collation string `json:"collation,omitempty"`

	// Default specifies the default value of a column. Note that using this option
	// will override the default behavior of the code-generation. For example:
	//
	//	entsql.Annotation{
	//		Default: "CURRENT_TIMESTAMP",
	//	}
	//
	//	entsql.Annotation{
	//		Default: "uuid_generate_v4()",
	//	}
	//
	Default string `json:"default,omitempty"`

	// Options defines the additional table options. For example:
	//
	//	entsql.Annotation{
	//		Options: "ENGINE = INNODB",
	//	}
	//
	Options string `json:"options,omitempty"`

	// Size defines the column size in the generated schema. For example:
	//
	//	entsql.Annotation{
	//		Size: 128,
	//	}
	//
	Size int64 `json:"size,omitempty"`

	// Incremental defines the autoincremental behavior of a column. For example:
	//
	//  incrementalEnabled := true
	//  entsql.Annotation{
	//      Incremental: &incrementalEnabled,
	//  }
	//
	// By default, this value is nil defaulting to whatever best fits each scenario.
	//
	Incremental *bool `json:"incremental,omitempty"`

	// OnDelete specifies a custom referential action for DELETE operations on parent
	// table that has matching rows in the child table.
	//
	// For example, in order to delete rows from the parent table and automatically delete
	// their matching rows in the child table, pass the following annotation:
	//
	//	entsql.Annotation{
	//		OnDelete: entsql.Cascade,
	//	}
	//
	OnDelete ReferenceOption `json:"on_delete,omitempty"`
}

Annotation is a builtin schema annotation for attaching SQL metadata to schema objects for both codegen and runtime.

func (Annotation) Merge

func (a Annotation) Merge(other schema.Annotation) schema.Annotation

Merge implements the schema.Merger interface.

func (Annotation) Name

func (Annotation) Name() string

Name describes the annotation name.

type ReferenceOption

type ReferenceOption string

ReferenceOption for constraint actions.

const (
	NoAction   ReferenceOption = "NO ACTION"
	Restrict   ReferenceOption = "RESTRICT"
	Cascade    ReferenceOption = "CASCADE"
	SetNull    ReferenceOption = "SET NULL"
	SetDefault ReferenceOption = "SET DEFAULT"
)

Reference options (actions) specified by ON UPDATE and ON DELETE subclauses of the FOREIGN KEY clause.

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