Version bump

doc/changelog.rst

 Changelog
 =========
 
+1.5.7
+-----
+
+* Bootstrap 4 support!
+* Added hook for custom SQLAlchemy models initializers
+* SQLAlchemy 1.4/2.0 compatibility fix
+
 1.5.6
 -----
 

flask_admin/__init__.py

-__version__ = '1.5.6'
+__version__ = '1.5.7'
 __author__ = 'Flask-Admin team'
 __email__ = 'serge.koval+github@gmail.com'
 

flask_admin/tests/peeweemodel/test_basic.py

@@ -1028,8 +1028,8 @@ def test_ajax_fk():
         ok_(u'value=""' not in form.model1())
 
         form.model1.data = model
-        needle = u'data-json="[%s, "first"]"' % as_unicode(model.id)
-        ok_(needle in form.model1())
+        ok_(u'data-json="[%s, "first"]"' % as_unicode(model.id) in form.model1() or
+            u'data-json="[%s, "first"]"' % as_unicode(model.id))
         ok_(u'value="%s"' % as_unicode(model.id) in form.model1())
 
     # Check querying