Cascading auto-drops

angel_orm_generator/CHANGELOG.md

@@ -3,6 +3,7 @@
 * Handle cases where the class is not a `Model`.
     * Stop assuming things have `id`, etc.
 * Resolve a bug where the `indexType` of `@Column` annotations. would not be found.
+* Add `cascade: true` to drops for hasOne/hasMany/ManyToMany migrations.
 
 # 2.0.0-dev.6
 * Fix bug where an extra field would be inserted into joins and botch the result.

angel_orm_generator/lib/src/migration_generator.dart

@@ -237,8 +237,18 @@ class MigrationGenerator extends GeneratorForAnnotation<Orm> {
         ..annotations.add(refer('override'))
         ..requiredParameters.add(_schemaParam)
         ..body = new Block((b) {
-          b.addExpression(
-              _schema.property('drop').call([literalString(ctx.tableName)]));
+          var named = <String, Expression>{};
+
+          if (ctx.relations.values.any((r) =>
+              r.type == RelationshipType.hasOne ||
+              r.type == RelationshipType.hasMany ||
+              r.isManyToMany)) {
+            named['cascade'] = literalTrue;
+          }
+
+          b.addExpression(_schema
+              .property('drop')
+              .call([literalString(ctx.tableName)], named));
         });
     });
   }