mirror of https://github.com/go-gorm/gorm.git
74 lines
2.3 KiB
Go
74 lines
2.3 KiB
Go
package gorm
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import (
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"fmt"
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"strings"
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)
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func (scope *Scope) createTable() *Scope {
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var sqls []string
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for _, field := range scope.Fields() {
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if !field.IsIgnored && len(field.SqlTag) > 0 {
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sqls = append(sqls, scope.Quote(field.DBName)+" "+field.SqlTag)
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}
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}
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scope.Raw(fmt.Sprintf("CREATE TABLE %v (%v)", scope.TableName(), strings.Join(sqls, ","))).Exec()
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return scope
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}
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func (scope *Scope) dropTable() *Scope {
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scope.Raw(fmt.Sprintf("DROP TABLE %v", scope.TableName())).Exec()
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return scope
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}
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func (scope *Scope) modifyColumn(column string, typ string) {
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scope.Raw(fmt.Sprintf("ALTER TABLE %v MODIFY %v %v", scope.TableName(), scope.Quote(column), typ)).Exec()
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}
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func (scope *Scope) dropColumn(column string) {
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scope.Raw(fmt.Sprintf("ALTER TABLE %v DROP COLUMN %v", scope.TableName(), scope.Quote(column))).Exec()
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}
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func (scope *Scope) addIndex(column string, names ...string) {
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var indexName string
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if len(names) > 0 {
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indexName = names[0]
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} else {
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indexName = fmt.Sprintf("index_%v_on_%v", scope.TableName(), column)
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}
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scope.Raw(fmt.Sprintf("CREATE INDEX %v ON %v(%v);", indexName, scope.TableName(), scope.Quote(column))).Exec()
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}
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func (scope *Scope) removeIndex(indexName string) {
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scope.Raw(fmt.Sprintf("DROP INDEX %v ON %v", indexName, scope.TableName())).Exec()
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}
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func (scope *Scope) autoMigrate() *Scope {
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var tableName string
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scope.Raw(fmt.Sprintf("SELECT table_name FROM INFORMATION_SCHEMA.tables where table_name = %v", scope.AddToVars(scope.TableName())))
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scope.DB().QueryRow(scope.Sql, scope.SqlVars...).Scan(&tableName)
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scope.SqlVars = []interface{}{}
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// If table doesn't exist
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if len(tableName) == 0 {
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scope.createTable()
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} else {
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for _, field := range scope.Fields() {
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var column, data string
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scope.Raw(fmt.Sprintf("SELECT column_name, data_type FROM information_schema.columns WHERE table_name = %v and column_name = %v",
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scope.AddToVars(scope.TableName()),
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scope.AddToVars(field.DBName),
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))
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scope.DB().QueryRow(scope.Sql, scope.SqlVars...).Scan(&column, &data)
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scope.SqlVars = []interface{}{}
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// If column doesn't exist
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if len(column) == 0 && len(field.SqlTag) > 0 && !field.IsIgnored {
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scope.Raw(fmt.Sprintf("ALTER TABLE %v ADD %v %v;", scope.TableName(), field.DBName, field.SqlTag)).Exec()
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}
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}
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}
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return scope
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}
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