Support Django old versions

Author: 2ik

README.md

@@ -1,2 +1,2 @@
-# django-editorjs
+# Editor.js for Django
 Django plugin for using Editor.js

django_editorjs/config.py

@@ -3,6 +3,9 @@
 
 from django.conf import settings
 
+
+DEBUG = getattr(settings, "DEBUG", False)
+
 EDITORJS_IMAGE_UPLOAD_PATH = str(getattr(
     settings,
     'EDITORJS_IMAGE_UPLOAD_PATH',

django_editorjs/fields.py

@@ -1,16 +1,37 @@
-from django.db.models import Field, JSONField
+import traceback
+
+import django
+from django.db.models import Field
 from django.forms import Textarea
 
 from django_editorjs.widgets import EditorJsWidget
 
+from .config import DEBUG
+
+try:
+    # pylint: disable=ungrouped-imports
+    from django.db.models import JSONField
+except ImportError:
+    pass
+
+NEW_VERSION = False
+
+if django.VERSION[0] == 3 and django.VERSION[1] >= 1:
+    NEW_VERSION = True
+
+
+class FieldMixin(Field):
+    def get_internal_type(self):
+        return "TextField"
+
 
 class EditorJsFieldMixin:
-    def __init__(self, *args, plugins=None, tools=None, **kwargs):
+    def __init__(self, plugins=None, tools=None, **kwargs):
         self.plugins = plugins
         self.tools = tools
         self.version = kwargs.pop('version', '2.18.0')
         self.use_editor_js = kwargs.pop('use_editor_js', True)
-        super().__init__(*args, **kwargs)
+        super().__init__(**kwargs)
 
     def formfield(self, **kwargs):
         if self.use_editor_js:
@@ -26,10 +47,21 @@ def formfield(self, **kwargs):
         return super().formfield(**defaults)
 
 
-class EditorJsTextField(EditorJsFieldMixin, Field):
-    def get_internal_type(self):
-        return "TextField"
+class EditorJsTextField(EditorJsFieldMixin, FieldMixin):
+    def __init__(self, plugins=None, tools=None, **kwargs):
+        super().__init__(plugins, tools, **kwargs)
 
 
-class EditorJsJSONField(EditorJsFieldMixin, JSONField):
-    pass
+class EditorJsJSONField(EditorJsFieldMixin, JSONField if NEW_VERSION else FieldMixin):
+    def __init__(self, plugins=None, tools=None, **kwargs):
+        if not NEW_VERSION and DEBUG:
+            print()
+            print('\x1b[0;30;43m {}\x1b[0m'.format(
+                'Warning: you don\'t support JSONField, ' +
+                'please use EditorJsTextField instead of EditorJsJSONField'
+            ))
+            print('\x1b[2;34;93m{}\x1b[0m'.format(
+                traceback.format_stack()[-3:][0]
+            ))
+            print()
+        super().__init__(plugins, tools, **kwargs)