package gorm

import (
	"context"
	"database/sql"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

// Dialector GORM database 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)

        platform: [ubuntu-latest]
    runs-on: ${{ matrix.platform }}

    services:
      mysql:
        image: ${{ matrix.dbversion }}
        env:
          MYSQL_DATABASE: gorm
          MYSQL_USER: gorm
          MYSQL_PASSWORD: gorm
          MYSQL_RANDOM_ROOT_PASSWORD: "yes"
        ports:
          - 9910:3306
        options: >-
          --health-cmd "mysqladmin ping -ugorm -pgorm"
          --health-interval 10s

package gorm

import (
	"reflect"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

// Migrator returns migrator
func (db *DB) Migrator() Migrator {
	tx := db.getInstance()

	// apply scopes to migrator
	for len(tx.Statement.scopes) > 0 {
		tx = tx.executeScopes()
	}

	return tx.Dialector.Migrator(tx.Session(&Session{}))
}

// AutoMigrate run auto migration for given models

package tests_test

import (
	"context"
	"encoding/json"
	"regexp"
	"sort"
	"strconv"
	"sync"
	"testing"
	"time"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	. "gorm.io/gorm/utils/tests"
)

func TestPreloadWithAssociations(t *testing.T) {
	user := *GetUser("preload_with_associations", Config{
		Account:   true,
		Pets:      2,
		Toys:      3,
		Company:   true,
		Manager:   true,
		Team:      4,

}

func TestBelongsToAssociationUnscoped(t *testing.T) {
	type ItemParent struct {
		gorm.Model
		Logo string `gorm:"not null;type:varchar(50)"`
	}
	type ItemChild struct {
		gorm.Model
		Name         string `gorm:"type:varchar(50)"`
		ItemParentID uint
		ItemParent   ItemParent
	}

	tx := DB.Session(&gorm.Session{})
	tx.Migrator().DropTable(&ItemParent{}, &ItemChild{})

package tests_test

import (
	"context"
	"database/sql"
	"os"
	"reflect"
	"testing"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

type wrapperTx struct {
	*sql.Tx
	conn *wrapperConnPool
}

func (c *wrapperTx) PrepareContext(ctx context.Context, query string) (*sql.Stmt, error) {
	c.conn.got = append(c.conn.got, query)
	return c.Tx.PrepareContext(ctx, query)
}

package callbacks

import (
	"gorm.io/gorm"
)

func BeginTransaction(db *gorm.DB) {
	if !db.Config.SkipDefaultTransaction && db.Error == nil {
		if tx := db.Begin(); tx.Error == nil {
			db.Statement.ConnPool = tx.Statement.ConnPool
			db.InstanceSet("gorm:started_transaction", true)
		} else if tx.Error == gorm.ErrInvalidTransaction {
			tx.Error = nil
		} else {
			db.Error = tx.Error
		}
	}
}

  ...

package callbacks

import (
	"gorm.io/gorm"
)

var (
	createClauses = []string{"INSERT", "VALUES", "ON CONFLICT"}
	queryClauses  = []string{"SELECT", "FROM", "WHERE", "GROUP BY", "ORDER BY", "LIMIT", "FOR"}
	updateClauses = []string{"UPDATE", "SET", "WHERE"}
	deleteClauses = []string{"DELETE", "FROM", "WHERE"}
)

type Config struct {
	LastInsertIDReversed bool
	CreateClauses        []string
	QueryClauses         []string

package tests_test

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"encoding/json"
	"errors"
	"fmt"
	"reflect"
	"regexp"
	"strconv"
	"testing"
	"time"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	. "gorm.io/gorm/utils/tests"
)

func TestScannerValuer(t *testing.T) {
	DB.Migrator().DropTable(&ScannerValuerStruct{})
	if err := DB.Migrator().AutoMigrate(&ScannerValuerStruct{}); err != nil {