From b2aad8da313471235376c83af5d9388c96c6d70a Mon Sep 17 00:00:00 2001
From: Tomas <tomas@openexo.com>
Date: Tue, 24 Sep 2019 10:44:30 +0200
Subject: [PATCH] Adding back compatibility

---
 .travis.yml                   |  65 ++++++++++
 README.rst                    |  18 +--
 example/app/test_msf.py       |  29 ++++-
 example/app/views.py          |   7 +-
 example/example/urls.py       |  57 ++++++---
 example/run_tests.py          |   7 +-
 multiselectfield/db/fields.py |   5 +-
 setup.py                      |   6 +-
 tox.ini                       | 219 +++++++++++++++++++++++++++++++++-
 9 files changed, 373 insertions(+), 40 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 873d9f2..41e573e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,27 +1,92 @@
 language: python
 
 python:
+  - "2.6"
   - "2.7"
+  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"
 env:
+  - DJANGO_VERSION='Django>=1.4,<1.5'
+  - DJANGO_VERSION='Django>=1.5,<1.6'
+  - DJANGO_VERSION='Django>=1.6,<1.7'
+  - DJANGO_VERSION='Django>=1.7,<1.8'
+  - DJANGO_VERSION='Django>=1.8,<1.9'
+  - DJANGO_VERSION='Django>=1.9,<1.10'
+  - DJANGO_VERSION='Django>=1.10,<1.11'
   - DJANGO_VERSION='Django>=1.11,<2.0'
   - DJANGO_VERSION='Django>=2.0,<2.1'
   - DJANGO_VERSION='Django>=2.1,<2.2'
   - DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
 matrix:
   exclude:
+    - python: "2.6"
+      env: DJANGO_VERSION='Django>=1.7,<1.8'
+    - python: "2.6"
+      env: DJANGO_VERSION='Django>=1.8,<1.9'
+    - python: "2.6"
+      env: DJANGO_VERSION='Django>=1.9,<1.10'
+    - python: "2.6"
+      env: DJANGO_VERSION='Django>=1.10,<1.11'
+    - python: "2.6"
+      env: DJANGO_VERSION='Django>=1.11,<2.0'
+    - python: "2.6"
+      env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
     - python: "2.7"
+      env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
+    - python: "3.3"
+      env: DJANGO_VERSION='Django>=1.4,<1.5'
+    - python: "3.3"
+      env: DJANGO_VERSION='Django>=1.5,<1.6'
+    - python: "3.3"
+      env: DJANGO_VERSION='Django>=1.9,<1.10'
+    - python: "3.3"
+      env: DJANGO_VERSION='Django>=1.10,<1.11'
+    - python: "3.3"
+      env: DJANGO_VERSION='Django>=1.11,<2.0'
+    - python: "3.3"
       env: DJANGO_VERSION='Django>=2.0,<2.1'
     - python: "2.7"
       env: DJANGO_VERSION='Django>=2.1,<2.2'
     - python: "2.7"
       env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
+    - python: "3.4"
+      env: DJANGO_VERSION='Django>=1.4,<1.5'
+    - python: "3.4"
+      env: DJANGO_VERSION='Django>=1.5,<1.6'
+    - python: "3.4"
+      env: DJANGO_VERSION='Django>=1.6,<1.7'
     - python: "3.4"
       env: DJANGO_VERSION='Django>=2.1,<2.2'
     - python: "2.7"
       env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
+    - python: "3.5"
+      env: DJANGO_VERSION='Django>=1.4,<1.5'
+    - python: "3.5"
+      env: DJANGO_VERSION='Django>=1.5,<1.6'
+    - python: "3.5"
+      env: DJANGO_VERSION='Django>=1.6,<1.7'
+    - python: "3.5"
+      env: DJANGO_VERSION='Django>=1.7,<1.8'
+    - python: "3.5"
+      env: DJANGO_VERSION='Django>=2.1,<=2.2'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.4,<1.5'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.5,<1.6'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.6,<1.7'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.7,<1.8'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.8,<1.9'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.9,<1.10'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=1.10,<1.11'
+    - python: "3.6"
+      env: DJANGO_VERSION='Django>=2.1,<=2.2'
   allow_failures:
     - env: DJANGO_VERSION='https://github.com/django/django/archive/master.tar.gz'
 
diff --git a/README.rst b/README.rst
index 628dbad..fb5d7ac 100644
--- a/README.rst
+++ b/README.rst
@@ -14,9 +14,9 @@ A new model field and form field. With this you can get a multiple select from a
 
 This egg is inspired by this `snippet <http://djangosnippets.org/snippets/1200/>`_.
 
-Supported Python versions: 2.7, 3.4+
+Supported Python versions: 2.6, 2.7, 3.3+
 
-Supported Django versions: 1.11-2.0+
+Supported Django versions: 1.4-2.0+
 
 Installation
 ============
@@ -35,25 +35,25 @@ Configure your models.py
 .. code-block:: python
 
     from multiselectfield import MultiSelectField
-    
+
     # ...
-    
+
     MY_CHOICES = (('item_key1', 'Item title 1.1'),
                   ('item_key2', 'Item title 1.2'),
                   ('item_key3', 'Item title 1.3'),
                   ('item_key4', 'Item title 1.4'),
                   ('item_key5', 'Item title 1.5'))
-    
+
     MY_CHOICES2 = ((1, 'Item title 2.1'),
                    (2, 'Item title 2.2'),
                    (3, 'Item title 2.3'),
                    (4, 'Item title 2.4'),
                    (5, 'Item title 2.5'))
-    
+
     class MyModel(models.Model):
-        
+
         # .....
-        
+
         my_field = MultiSelectField(choices=MY_CHOICES)
         my_field2 = MultiSelectField(choices=MY_CHOICES2,
                                      max_choices=3,
@@ -103,7 +103,7 @@ Django REST Framework comes with a ``MultipleChoiceField`` that works perfectly
 .. code-block:: python
 
     from rest_framework import fields, serializers
-    
+
     from myapp.models import MY_CHOICES, MY_CHOICES2
 
     class MyModelSerializer(serializers.HyperlinkedModelSerializer):
diff --git a/example/app/test_msf.py b/example/app/test_msf.py
index dc057ee..ccec10e 100644
--- a/example/app/test_msf.py
+++ b/example/app/test_msf.py
@@ -32,8 +32,12 @@ else:
     u = str
 
 
-def get_field(model, name):
-    return model._meta.get_field(name)
+if VERSION < (1, 9):
+    def get_field(model, name):
+        return model._meta.get_field_by_name(name)[0]
+else:
+    def get_field(model, name):
+        return model._meta.get_field(name)
 
 
 class MultiSelectTestCase(TestCase):
@@ -73,8 +77,12 @@ class MultiSelectTestCase(TestCase):
         # call Field.from_db_field, it simply returns a Python representation
         # of the data in the database (which in our case is a string of
         # comma-separated values). The bug was fixed in Django 1.8+.
-        self.assertListEqual(tag_list_list, [['sex', 'work', 'happy']])
-        self.assertListEqual(categories_list_list, [['1', '3', '5']])
+        if VERSION >= (1, 6) and VERSION < (1, 8):
+            self.assertStringEqual(tag_list_list, [u('sex,work,happy')])
+            self.assertStringEqual(categories_list_list, [u('1,3,5')])
+        else:
+            self.assertListEqual(tag_list_list, [['sex', 'work', 'happy']])
+            self.assertListEqual(categories_list_list, [['1', '3', '5']])
 
     def test_form(self):
         form_class = modelform_factory(Book, fields=('title', 'tags', 'categories'))
@@ -131,17 +139,28 @@ class MultiSelectTestCase(TestCase):
         self.assertEqual(len(form_class.base_fields), 1)
         form = form_class(initial={'published_in': ['BC', 'AK']})
 
-        expected_html = u("""<p><label>Province or State:</label> <ul id="id_published_in"><li>Canada - Provinces<ul id="id_published_in_0"><li><label for="id_published_in_0_0"><input id="id_published_in_0_0" name="published_in" type="checkbox" value="AB" /> Alberta</label></li>\n"""
+        expected_html = u("""<p><label for="id_published_in_0">Province or State:</label> <ul id="id_published_in"><li>Canada - Provinces<ul id="id_published_in_0"><li><label for="id_published_in_0_0"><input id="id_published_in_0_0" name="published_in" type="checkbox" value="AB" /> Alberta</label></li>\n"""
                           """<li><label for="id_published_in_0_1"><input checked="checked" id="id_published_in_0_1" name="published_in" type="checkbox" value="BC" /> British Columbia</label></li></ul></li>\n"""
                           """<li>USA - States<ul id="id_published_in_1"><li><label for="id_published_in_1_0"><input checked="checked" id="id_published_in_1_0" name="published_in" type="checkbox" value="AK" /> Alaska</label></li>\n"""
                           """<li><label for="id_published_in_1_1"><input id="id_published_in_1_1" name="published_in" type="checkbox" value="AL" /> Alabama</label></li>\n"""
                           """<li><label for="id_published_in_1_2"><input id="id_published_in_1_2" name="published_in" type="checkbox" value="AZ" /> Arizona</label></li></ul></li></ul></p>""")
 
         actual_html = form.as_p()
+        if (1, 11) <= VERSION < (2, 0):
+            # Django 1.11+ does not assign 'for' attributes on labels if they
+            # are group labels
+            expected_html = expected_html.replace('label for="id_published_in_0"', 'label')
+
+        if VERSION < (1, 6):
+            # Django 1.6 renders the Python repr() for each group (eg: tuples
+            # with HTML entities), so we skip the test for that version
+            self.assertEqual(expected_html.replace('\n', ''), actual_html.replace('\n', ''))
 
         if VERSION >= (2, 0):
             expected_html = expected_html.replace('input checked="checked"', 'input checked')
 
+        if VERSION >= (1, 7):
+            self.assertHTMLEqual(expected_html, actual_html)
         self.assertHTMLEqual(expected_html, actual_html)
 
 
diff --git a/example/app/views.py b/example/app/views.py
index 6142ef1..5feb26f 100644
--- a/example/app/views.py
+++ b/example/app/views.py
@@ -14,12 +14,15 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this software.  If not, see <http://www.gnu.org/licenses/>.
 
-
+from django import VERSION
 from django.conf import settings
 from django.contrib.auth import login
 from django.contrib.auth import get_user_model
 
-from django.urls import reverse
+if VERSION >= (2, 0):
+    from django.urls import reverse
+else:
+    from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect
 
 
diff --git a/example/example/urls.py b/example/example/urls.py
index 0e60278..baee4c1 100644
--- a/example/example/urls.py
+++ b/example/example/urls.py
@@ -14,11 +14,26 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this software.  If not, see <http://www.gnu.org/licenses/>.
 
+from django import VERSION
 from django.conf import settings
 try:
     from django.conf.urls import include, url
-except ImportError:
-    from django.urls import include, url
+    # Compatibility for Django > 1.8
+    def patterns(prefix, *args):
+        if VERSION < (1, 9):
+            from django.conf.urls import patterns as django_patterns
+            return django_patterns(prefix, *args)
+        elif prefix != '':
+            raise NotImplementedError("You need to update your URLConf for "
+                                      "Django 1.10, or tweak it to remove the "
+                                      "prefix parameter")
+        else:
+            return list(args)
+except ImportError:  # Django < 1.4
+    if VERSION < (1, 4):
+        from django.conf.urls.defaults import include, patterns, url
+    else:
+        from django.urls import include, url
 from django.contrib import admin
 from django.views.static import serve
 
@@ -29,18 +44,26 @@ js_info_dict = {
     'packages': ('django.conf',),
 }
 
-urlpatterns = [
-    url(r'^', include('app.urls')),
-    url(r'^admin/', admin.site.urls),
-]
-
-urlpatterns += [
-    url(
-        r'^%s(?P<path>.*)$' % settings.MEDIA_URL[1:],
-        serve,
-        {
-            'document_root': settings.MEDIA_ROOT,
-            'show_indexes': True,
-        },
-    ),
-]
+if VERSION < (1, 11):
+    urlpatterns = patterns(
+        '',
+        url(r'^', include('app.urls')),
+        url(r'^admin/', include(admin.site.urls)),
+    )
+    urlpatterns += patterns(
+        '',
+        url(r'^%s(?P<path>.*)$' % settings.MEDIA_URL[1:]),
+    )
+else:
+    urlpatterns = [
+        url(r'^', include('app.urls')),
+        url(r'^admin/', admin.site.urls),
+        url(
+            r'^%s(?P<path>.*)$' % settings.MEDIA_URL[1:],
+            serve,
+            {
+                'document_root': settings.MEDIA_ROOT,
+                'show_indexes': True,
+            },
+        ),
+    ]
diff --git a/example/run_tests.py b/example/run_tests.py
index ec3f39a..42bf316 100644
--- a/example/run_tests.py
+++ b/example/run_tests.py
@@ -19,6 +19,7 @@
 import os
 import sys
 
+import django
 from django.conf import ENVIRONMENT_VARIABLE
 from django.core import management
 from django.core.wsgi import get_wsgi_application
@@ -29,6 +30,10 @@ if len(sys.argv) == 1:
 else:
     os.environ[ENVIRONMENT_VARIABLE] = sys.argv[1]
 
-application = get_wsgi_application()
+if django.VERSION[0] == 1 and django.VERSION[1] >= 7:
+    from django.core.wsgi import get_wsgi_application as get_wsgi_application_v1
+    application = get_wsgi_application_v1()
+else:
+    application = get_wsgi_application()
 
 management.call_command('test', 'app')
diff --git a/multiselectfield/db/fields.py b/multiselectfield/db/fields.py
index 0fd8966..85bc5eb 100644
--- a/multiselectfield/db/fields.py
+++ b/multiselectfield/db/fields.py
@@ -102,7 +102,10 @@ class MultiSelectField(models.CharField):
         return choices_selected
 
     def value_to_string(self, obj):
-        value = super(MultiSelectField, self).value_from_object(obj)
+        try:
+            value = self._get_val_from_obj(obj)
+        except AttributeError:
+            value = super(MultiSelectField, self).value_from_object(obj)
         return self.get_prep_value(value)
 
     def validate(self, value, model_instance):
diff --git a/setup.py b/setup.py
index acf9632..c5bba96 100644
--- a/setup.py
+++ b/setup.py
@@ -41,8 +41,10 @@ setup(
         'Framework :: Django',
         'License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
@@ -54,13 +56,13 @@ setup(
     packages=find_packages(),
     include_package_data=True,
     tests_require=[
-        'django>=1.11',
+        'django>=1.4',
         'tox',
         'coverage',
         'flake8',
     ],
     install_requires=[
-        'django>=1.11',
+        'django>=1.4',
     ],
     zip_safe=False,
 )
diff --git a/tox.ini b/tox.ini
index df70693..fecc625 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35,36}-dj111,py{34,35,36,37}-dj20,py{35,36,37}-dj21
+envlist = py{26,27,33,34,35,36}-dj{14,15,16,16,17,18,19,110,111},py{34,35,36,37}-dj{14,15,16,16,17,18,19,110,111,20},py{35,36,37}-dj{21,22},
 
 [testenv]
 usedevelop = True
@@ -12,6 +12,141 @@ commands =
 install_command =
     pip install {opts} {packages}
 
+[testenv:py26-dj14]
+basepython = python2.6
+deps =
+    django==1.4.22
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj15]
+basepython = python2.6
+deps =
+    django==1.5.12
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj16]
+basepython = python2.6
+deps =
+    django==1.6.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj17]
+basepython = python2.6
+deps =
+    django==1.7.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj18]
+basepython = python2.6
+deps =
+    django==1.8.17
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj19]
+basepython = python2.6
+deps =
+    django==1.9.12
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj110]
+basepython = python2.6
+deps =
+    django==1.10.4
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py26-dj111]
+basepython = python2.6
+deps =
+    django==1.11.15
+    pillow==1.7.8
+    PyYAML==3.13
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj14]
+basepython = python2.7
+deps =
+    django==1.4.22
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj15]
+basepython = python2.7
+deps =
+    django==1.5.12
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj16]
+basepython = python2.7
+deps =
+    django==1.6.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj17]
+basepython = python2.7
+deps =
+    django==1.7.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj18]
+basepython = python2.7
+deps =
+    django==1.8.17
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj19]
+basepython = python2.7
+deps =
+    django==1.9.12
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py27-dj110]
+basepython = python2.7
+deps =
+    django==1.10.4
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
 [testenv:py27-dj111]
 basepython = python2.7
 deps =
@@ -21,6 +156,59 @@ deps =
     coveralls==0.3
     flake8
 
+[testenv:py33-dj16]
+basepython = python3.3
+deps =
+    django==1.6.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py33-dj17]
+basepython = python3.3
+deps =
+    django==1.7.11
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py33-dj18]
+basepython = python3.3
+deps =
+    django==1.8.17
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py33-dj19]
+basepython = python3.3
+deps =
+    django==1.9.12
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py33-dj110]
+basepython = python3.3
+deps =
+    django==1.10.4
+    pillow==1.7.8
+    PyYAML==3.10
+    coveralls==0.3
+    flake8
+
+[testenv:py33-dj111]
+basepython = python3.3
+deps =
+    django==1.11.15
+    pillow==1.7.8
+    PyYAML==3.13
+    coveralls==0.3
+    flake8
 
 [testenv:py34-dj111]
 basepython = python3.4
@@ -40,7 +228,6 @@ deps =
     coveralls==0.3
     flake8
 
-
 [testenv:py35-dj111]
 basepython = python3.5
 deps =
@@ -68,6 +255,15 @@ deps =
     coveralls==0.3
     flake8
 
+[testenv:py35-dj22]
+basepython = python3.5
+deps =
+    django==2.2.1
+    pillow==2.1.0
+    PyYAML==3.13
+    coveralls==0.3
+    flake8
+
 [testenv:py36-dj111]
 basepython = python3.6
 deps =
@@ -95,6 +291,14 @@ deps =
     coveralls==0.3
     flake8
 
+[testenv:py36-dj22]
+basepython = python3.6
+deps =
+    django==2.2.1
+    pillow==2.1.0
+    PyYAML==3.13
+    coveralls==0.3
+    flake8
 
 [testenv:py37-dj20]
 basepython = python3.7
@@ -112,4 +316,13 @@ deps =
     pillow==2.1.0
     PyYAML==3.13
     coveralls==0.3
-    flake8
\ No newline at end of file
+    flake8
+
+[testenv:py37-dj22]
+basepython = python3.7
+deps =
+    django==2.2.1
+    pillow==2.1.0
+    PyYAML==3.13
+    coveralls==0.3
+    flake8