Disable add existing constraint (#145)

crastinus · Andrey Likhachev · web-flow · commit 915abc396965 · 2022-12-24T12:48:27.000+08:00
Co-authored-by: Andrey Likhachev &lt;likhachev@bifit.int&gt;
diff --git a/migrator.go b/migrator.go
@@ -319,7 +319,7 @@ func (m Migrator) AlterColumn(value interface{}, field string) error {
 				}
 			}
 
-			if uniq, _ := fieldColumnType.Unique(); uniq != field.Unique {
+			if uniq, _ := fieldColumnType.Unique(); !uniq && field.Unique {
 				idxName := clause.Column{Name: m.DB.Config.NamingStrategy.IndexName(stmt.Table, field.DBName)}
 				if err := m.DB.Exec("ALTER TABLE ? ADD CONSTRAINT ? UNIQUE(?)", m.CurrentTable(stmt), idxName, clause.Column{Name: field.DBName}).Error; err != nil {
 					return err

Original file line number	Diff line number	Diff line change
`@@ -319,7 +319,7 @@ func (m Migrator) AlterColumn(value interface{}, field string) error {`
`319`	`319`	`}`
`320`	`320`	`}`
`321`	`321`
`322`		`- if uniq, _ := fieldColumnType.Unique(); uniq != field.Unique {`
	`322`	`+ if uniq, _ := fieldColumnType.Unique(); !uniq && field.Unique {`
`323`	`323`	`idxName := clause.Column{Name: m.DB.Config.NamingStrategy.IndexName(stmt.Table, field.DBName)}`
`324`	`324`	`if err := m.DB.Exec("ALTER TABLE ? ADD CONSTRAINT ? UNIQUE(?)", m.CurrentTable(stmt), idxName, clause.Column{Name: field.DBName}).Error; err != nil {`
`325`	`325`	`return err`