Fixed #378. Properly check if field is missing when using form rules

flask_admin/form/rules.py

@@ -271,7 +271,7 @@ class Field(Macro):
         """
         field = getattr(form, self.field_name, None)
 
-        if not field:
+        if field is None:
             raise ValueError('Form %s does not have field %s' % (form, self.field_name))
 
         opts = {}

flask_admin/tests/sqlamodel/test_basic.py

@@ -56,7 +56,7 @@ def create_models(db):
 
         # Relation
         model1_id = db.Column(db.Integer, db.ForeignKey(Model1.id))
-        model1 = db.relationship(Model1)
+        model1 = db.relationship(Model1, backref='model2')
 
     db.create_all()
 

flask_admin/tests/sqlamodel/test_form_rules.py

@@ -122,3 +122,20 @@ def test_rule_field_set():
     ok_(pos1 > pos2)
     ok_(pos4 > pos1)
     ok_(pos3 == -1)
+
+
+def test_rule_inlinefieldlist():
+    app, db, admin = setup()
+
+    Model1, Model2 = create_models(db)
+    db.create_all()
+
+    view = CustomModelView(Model1, db.session,
+                           inline_models=(Model2,),
+                           form_create_rules=('test1', 'model2'))
+    admin.add_view(view)
+
+    client = app.test_client()
+
+    rv = client.get('/admin/model1view/new/')
+    eq_(rv.status_code, 200)