gorm

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Published: Apr 21, 2024 License: MIT Imports: 18 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
	// 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
	// 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
	// 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) 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) 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) 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) 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) 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) SaveCheck0Primary

func (db *DB) SaveCheck0Primary(value interface{}) (tx *DB)

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) 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) 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)

Unscoped disables the global scope of soft deletion in a query. By default, GORM uses soft deletion, marking records as "deleted" by setting a timestamp on a specific field (e.g., `deleted_at`). Unscoped allows queries to include records marked as deleted, overriding the soft deletion behavior. Example:

var users []User
db.Unscoped().Find(&users)
// Retrieves all users, including deleted ones.

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 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 ErrorTranslator

type ErrorTranslator interface {
	Translate(err error) error
}

type GetDBConnector

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

GetDBConnector SQL db connector

type Index

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

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
	// MigrateColumnUnique migrate column's UNIQUE constraint, it's part of MigrateColumn.
	MigrateColumnUnique(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) Ping

func (db *PreparedStmtDB) Ping() 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 (sdb *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) GetDBConn

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

func (*PreparedStmtTX) Ping

func (tx *PreparedStmtTX) Ping() 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 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 (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 (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 (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 Statement

type Statement struct {
	*DB
	TableExpr            *clause.Expr
	Table                string
	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 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

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