Fix building docs

docs/_ext/djangodummy/requirements.txt

@@ -1,4 +1,5 @@
 # for readthedocs
 # Remaining requirements are picked up from setup.py
-Django==1.11
+Django==2.1
 django-extra-views==0.9.0
+sphinxcontrib-django >= 0.4

docs/_ext/djangoext/docstrings.py

@@ -1,41 +0,0 @@
-"""
-Automatically mention all model fields as parameters in the model construction.
-Based on http://djangosnippets.org/snippets/2533/
-"""
-import inspect
-from django.utils.encoding import force_text
-from django.utils.html import strip_tags
-
-
-def improve_model_docstring(app, what, name, obj, options, lines):
-    from django.db import models  # must be inside the function, to allow settings initialization first.
-
-    if inspect.isclass(obj) and issubclass(obj, models.Model):
-        model_fields = obj._meta.get_fields()
-
-        for field in model_fields:
-            help_text = strip_tags(force_text(field.help_text))
-            verbose_name = force_text(field.verbose_name).capitalize()
-
-            # Add parameter
-            if help_text:
-                lines.append(u':param %s: %s' % (field.attname, help_text))
-            else:
-                lines.append(u':param %s: %s' % (field.attname, verbose_name))
-
-            # Add type
-            if isinstance(field, models.ForeignKey):
-                to = field.rel.to
-                lines.append(u':type %s: %s to :class:`~%s.%s`' % (field.attname, type(field).__name__, to.__module__, to.__name__))
-            else:
-                lines.append(u':type %s: %s' % (field.attname, type(field).__name__))
-
-    # Return the extended docstring
-    return lines
-
-
-# Allow this module to be used as sphinx extension:
-def setup(app):
-    # Generate docstrings for Django model fields
-    # Register the docstring processor with sphinx
-    app.connect('autodoc-process-docstring', improve_model_docstring)

docs/_ext/djangoext/roles.py

@@ -1,8 +0,0 @@
-# Allow :django:setting:`SITE_ID` to work.
-
-def setup(app):
-    app.add_crossref_type(
-        directivename = "setting",
-        rolename = "setting",
-        indextemplate = "pair: %s; setting",
-    )

docs/conf.py

@@ -36,8 +36,7 @@ extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.graphviz',
     'sphinx.ext.intersphinx',
-    'djangoext.docstrings',
-    'djangoext.roles',
+    'sphinxcontrib_django',
 ]
 
 # Add any paths that contain templates here, relative to this directory.

tox.ini

@@ -29,6 +29,7 @@ deps =
 	sphinx_rtd_theme
 	Django
 	django-extra-views
+	sphinxcontrib-django
 changedir = docs
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html