rewrite QuillField to inherit JSONField (#27)

this allows the db backend to apply any optimizations it might want/need
closes #26

Co-authored-by: proxi <51172302+3n-k1@users.noreply.github.com>

django_quill/fields.py

@@ -1,3 +1,5 @@
+import json
+
 from django.db import models
 
 from .forms import QuillFormField
@@ -31,7 +33,7 @@ def _require_quill(self):
 
     def _get_quill(self):
         self._require_quill()
-        self._quill = Quill(self.json_string)
+        self._quill = Quill(json.loads(self.json_string))
         return self._quill
 
     def _set_quill(self, quill):

django_quill/forms.py

@@ -6,9 +6,12 @@
 )
 
 
-class QuillFormField(forms.fields.CharField):
+class QuillFormField(forms.fields.JSONField):
     def __init__(self, *args, **kwargs):
         kwargs.update({
             'widget': QuillWidget(),
         })
         super().__init__(*args, **kwargs)
+
+    def prepare_value(self, value):
+        return value.json_string

django_quill/quill.py

@@ -1,5 +1,4 @@
 import json
-from json import JSONDecodeError
 
 __all__ = (
     'QuillParseError',
@@ -18,9 +17,9 @@ def __str__(self):
 class Quill:
     def __init__(self, json_string):
         try:
-            self.json_string = json_string
-            json_data = json.loads(json_string)
+            self.json_string = json.dumps(json_string)
+            json_data = json_string
             self.delta = json_data['delta']
             self.html = json_data['html']
-        except (JSONDecodeError, KeyError, TypeError):
+        except (json.JSONDecodeError, KeyError, TypeError):
             raise QuillParseError(json_string)