strmangle

package
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Published: Jul 16, 2018 License: BSD-3-Clause Imports: 8 Imported by: 0

Documentation

Overview

Package strmangle is a collection of string manipulation functions. Primarily used by boil and templates for code generation. Because it is focused on pipelining inside templates you will see some odd parameter ordering.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CamelCase

func CamelCase(name string) string

CamelCase takes a variable name in the format of "var_name" and converts it into a go styled variable name of "varName". camelCase also fully uppercases "ID" components of names, for example "var_name_id" to "varNameID".

func ContainsAny

func ContainsAny(a []string, finds ...string) bool

ContainsAny returns true if any of the passed in strings are found in the passed in string slice

func GenerateIgnoreTags

func GenerateIgnoreTags(tags []string) string

GenerateIgnoreTags converts a slice of tag strings into ignore tags that can be passed onto the end of a struct, for example: tags: ["xml", "db"] convert to: xml:"-" db:"-"

func GenerateTags

func GenerateTags(tags []string, columnName string) string

GenerateTags converts a slice of tag strings into tags that can be passed onto the end of a struct, for example: tags: ["xml", "db"] convert to: xml:"column_name" db:"column_name"

func GetBuffer

func GetBuffer() *bytes.Buffer

GetBuffer retrieves a buffer from the buffer pool

func IdentQuote

func IdentQuote(lq byte, rq byte, s string) string

IdentQuote attempts to quote simple identifiers in SQL statements

func IdentQuoteSlice

func IdentQuoteSlice(lq byte, rq byte, s []string) []string

IdentQuoteSlice applies IdentQuote to a slice.

func Identifier

func Identifier(in int) string

Identifier is a base conversion from Base 10 integers to Base 26 integers that are represented by an alphabet from a-z See tests for example outputs.

func InsertColumnSet

func InsertColumnSet(cols, defaults, noDefaults, nonZeroDefaults, whitelist []string) ([]string, []string)

InsertColumnSet generates the set of columns to insert and return for an insert statement the return columns are used to get values that are assigned within the database during the insert to keep the struct in sync with what's in the db. with a whitelist: - the whitelist is used for the insert columns - the return columns are the result of (columns with default values - the whitelist) without a whitelist: - start with columns without a default as these always need to be inserted - add all columns that have a default in the database but that are non-zero in the struct - the return columns are the result of (columns with default values - the previous set)

func IsEnumNormal

func IsEnumNormal(values []string) bool

IsEnumNormal checks a set of eval values to see if they're "normal"

func JoinSlices

func JoinSlices(sep string, a, b []string) []string

JoinSlices merges two string slices of equal length

func MakeStringMap

func MakeStringMap(types map[string]string) string

MakeStringMap converts a map[string]string into the format: "key": "value", "key": "value"

func ParseEnumName

func ParseEnumName(s string) string

ParseEnumName returns the name portion of an enum if it exists

Postgres and MySQL drivers return different values psql: enum.enum_name('values'...) mysql: enum('values'...) In the case of mysql, the name will never return anything

func ParseEnumVals

func ParseEnumVals(s string) []string

ParseEnumVals returns the values from an enum string

Postgres and MySQL drivers return different values psql: enum.enum_name('values'...) mysql: enum('values'...)

func Placeholders

func Placeholders(indexPlaceholders bool, count int, start int, group int) string

Placeholders generates the SQL statement placeholders for in queries. For example, ($1,$2,$3),($4,$5,$6) etc. It will start counting placeholders at "start". If indexPlaceholders is false, it will convert to ? instead of $1 etc.

func Plural

func Plural(name string) string

Plural converts singular words to plural words (eg: person to people)

func PrefixStringSlice

func PrefixStringSlice(str string, strs []string) []string

PrefixStringSlice with the given str.

func PutBuffer

func PutBuffer(buf *bytes.Buffer)

PutBuffer back into the buffer pool

func QuoteCharacter

func QuoteCharacter(q byte) string

QuoteCharacter returns a string that allows the quote character to be embedded into a Go string that uses double quotes:

func ReplaceReservedWords

func ReplaceReservedWords(word string) string

ReplaceReservedWords takes a word and replaces it with word_ if it's found in the list of reserved words.

func SchemaTable

func SchemaTable(lq, rq string, driver string, schema string, table string) string

SchemaTable returns a table name with a schema prefixed if using a database that supports real schemas, for example, for Postgres: "schema_name"."table_name", for MS SQL: [schema_name].[table_name], versus simply "table_name" for MySQL (because it does not support real schemas)

func SetComplement

func SetComplement(a []string, b []string) []string

SetComplement subtracts the elements in b from a

func SetInclude

func SetInclude(str string, slice []string) bool

SetInclude checks to see if the string is found in the string slice

func SetMerge

func SetMerge(a []string, b []string) []string

SetMerge will return a merged slice without duplicates

func SetParamNames

func SetParamNames(lq, rq string, start int, columns []string) string

SetParamNames takes a slice of columns and returns a comma separated list of parameter names for a template statement SET clause. eg: "col1"=$1, "col2"=$2, "col3"=$3

func ShouldTitleCaseEnum

func ShouldTitleCaseEnum(value string) bool

ShouldTitleCaseEnum checks a value to see if it's title-case-able

func Singular

func Singular(name string) string

Singular converts plural words to singular words (eg: people to person)

func SortByKeys

func SortByKeys(keys []string, strs []string) []string

SortByKeys returns a new ordered slice based on the keys ordering

func StringMap

func StringMap(modifier func(string) string, strs []string) []string

StringMap maps a function over a slice of strings.

func StringSliceMatch

func StringSliceMatch(a []string, b []string) bool

StringSliceMatch returns true if the length of both slices is the same, and the elements of both slices are the same. The elements can be in any order.

func TitleCase

func TitleCase(n string) string

TitleCase changes a snake-case variable name into a go styled object variable name of "ColumnName". titleCase also fully uppercases "ID" components of names, for example "column_name_id" to "ColumnNameID".

Note: This method is ugly because it has been highly optimized, we found that it was a fairly large bottleneck when we were using regexp.

func TitleCaseIdentifier

func TitleCaseIdentifier(id string) string

TitleCaseIdentifier splits on dots and then titlecases each fragment. map titleCase (split c ".")

func UpdateColumnSet

func UpdateColumnSet(allColumns, pkeyCols, whitelist []string) []string

UpdateColumnSet generates the set of columns to update for an update statement. if a whitelist is supplied, it's returned if a whitelist is missing then we begin with all columns then we remove the primary key columns

func WhereClause

func WhereClause(lq, rq string, start int, cols []string) string

WhereClause returns the where clause using start as the $ flag index For example, if start was 2 output would be: "colthing=$2 AND colstuff=$3"

func WhereClauseRepeated

func WhereClauseRepeated(lq, rq string, start int, cols []string, count int) string

WhereClauseRepeated returns the where clause repeated with OR clause using start as the $ flag index For example, if start was 2 output would be: "(colthing=$2 AND colstuff=$3) OR (colthing=$4 AND colstuff=$5)"

Types

This section is empty.

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