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package migrator
type MigrationCondition interface {
Sql(dialect Dialect) (string, []interface{})
IsFulfilled(results []map[string][]byte) bool
}
type ExistsMigrationCondition struct{}
func (c *ExistsMigrationCondition) IsFulfilled(results []map[string][]byte) bool {
return len(results) >= 1
}
type NotExistsMigrationCondition struct{}
func (c *NotExistsMigrationCondition) IsFulfilled(results []map[string][]byte) bool {
return len(results) == 0
}
type IfIndexExistsCondition struct {
ExistsMigrationCondition
TableName string
IndexName string
}
func (c *IfIndexExistsCondition) Sql(dialect Dialect) (string, []interface{}) {
return dialect.IndexCheckSql(c.TableName, c.IndexName)
}
type IfIndexNotExistsCondition struct {
NotExistsMigrationCondition
TableName string
IndexName string
}
func (c *IfIndexNotExistsCondition) Sql(dialect Dialect) (string, []interface{}) {
return dialect.IndexCheckSql(c.TableName, c.IndexName)
}
type IfColumnNotExistsCondition struct {
NotExistsMigrationCondition
TableName string
ColumnName string
}
func (c *IfColumnNotExistsCondition) Sql(dialect Dialect) (string, []interface{}) {
return dialect.ColumnCheckSql(c.TableName, c.ColumnName)
}
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