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Actually check if a foreign key exists, before creating it.

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Signed-off-by: Stephan Peijnik <speijnik@anexia-it.com>
This commit is contained in:
Stephan Peijnik 2016-02-03 12:49:40 +01:00
parent e5ca672742
commit f4e9671baf
1 changed files with 5 additions and 0 deletions
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5
scope_private.go
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@ -615,6 +615,11 @@ func (scope *Scope) addIndex(unique bool, indexName string, column ...string) {
func (scope *Scope) addForeignKey(field string, dest string, onDelete string, onUpdate string) { func (scope *Scope) addForeignKey(field string, dest string, onDelete string, onUpdate string) {
var keyName = fmt.Sprintf("%s_%s_%s_foreign", scope.TableName(), field, dest) var keyName = fmt.Sprintf("%s_%s_%s_foreign", scope.TableName(), field, dest)
keyName = regexp.MustCompile("(_*[^a-zA-Z]+_*|_+)").ReplaceAllString(keyName, "_") keyName = regexp.MustCompile("(_*[^a-zA-Z]+_*|_+)").ReplaceAllString(keyName, "_")
if scope.Dialect().HasForeignKey(scope, scope.TableName(), keyName) {
return
}
var query = `ALTER TABLE %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s ON DELETE %s ON UPDATE %s;` var query = `ALTER TABLE %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s ON DELETE %s ON UPDATE %s;`
scope.Raw(fmt.Sprintf(query, scope.QuotedTableName(), scope.QuoteIfPossible(keyName), scope.QuoteIfPossible(field), dest, onDelete, onUpdate)).Exec() scope.Raw(fmt.Sprintf(query, scope.QuotedTableName(), scope.QuoteIfPossible(keyName), scope.QuoteIfPossible(field), dest, onDelete, onUpdate)).Exec()
} }