Prefix floats when dumping to json to reliably reconstruct them

django_unicorn/components/unicorn_template_response.py

@@ -16,6 +16,7 @@
     MultipleRootComponentElementError,
     NoRootComponentElementError,
 )
+from django_unicorn.serializer import loads
 from django_unicorn.settings import get_minify_html_enabled, get_script_location
 from django_unicorn.utils import generate_checksum, sanitize_html
 
@@ -136,7 +137,7 @@ def render(self):
             )
 
         frontend_context_variables = self.component.get_frontend_context_variables()
-        frontend_context_variables_dict = orjson.loads(frontend_context_variables)
+        frontend_context_variables_dict = loads(frontend_context_variables)
         checksum = generate_checksum(frontend_context_variables_dict)
 
         # Use `html.parser` and not `lxml` because in testing it was no faster even with `cchardet`

django_unicorn/serializer.py

@@ -2,6 +2,7 @@
 from datetime import timedelta
 from decimal import Decimal
 from functools import lru_cache
+import re
 from types import MappingProxyType
 from typing import Any, Dict, List, Optional, Tuple
 
@@ -283,7 +284,7 @@ def _fix_floats(current: Dict, data: Optional[Dict] = None, paths: Optional[List
             if idx == len(paths) - 1:
                 # `path` can be a dictionary key or list index,
                 # but in either instance it is set the same way
-                _piece[path] = str(current)
+                _piece[path] = 'django-unicorn-float-' + str(current)
             else:
                 _piece = _piece[path]
 
@@ -431,7 +432,9 @@ def loads(string: str) -> dict:
     """
 
     try:
-        return orjson.loads(string)
+        if isinstance(string, bytes):
+            string = string.decode()
+        return orjson.loads(re.sub(r'"django-unicorn-float-(\d+.\d+)"', r'\1', string))
     except orjson.JSONDecodeError as e:
         raise JSONDecodeError from e
 

tests/serializer/test_dumps.py

@@ -162,9 +162,9 @@ def test_complicated_model():
     expected = {
         "date": str(model.date),
         "datetime": model.datetime.isoformat()[:-3],
-        "decimal_value": "0.984",
+        "decimal_value": "django-unicorn-float-0.984",
         "duration": "-1 19:00:00",
-        "float_value": "0.583",
+        "float_value": "django-unicorn-float-0.583",
         "name": "abc",
         "pk": 2,
         "time": str(model.time)[:-3],
@@ -646,35 +646,35 @@ def test_get_model_dict_many_to_many_references_model():
 
 
 def test_float():
-    expected = '{"name":"0.0"}'
+    expected = '{"name":"django-unicorn-float-0.0"}'
     actual = serializer.dumps({"name": 0.0})
 
     assert expected == actual
 
 
 def test_dict_float():
-    expected = '{"name":{"another":"0.0"}}'
+    expected = '{"name":{"another":"django-unicorn-float-0.0"}}'
     actual = serializer.dumps({"name": {"another": 0.0}})
 
     assert expected == actual
 
 
 def test_list_float():
-    expected = '{"name":[1,2,"0.0"]}'
+    expected = '{"name":[1,2,"django-unicorn-float-0.0"]}'
     actual = serializer.dumps({"name": [1, 2, 0.0]})
 
     assert expected == actual
 
 
 def test_nested_list_float():
-    expected = '{"name":{"blob":[1,2,"0.0"]}}'
+    expected = '{"name":{"blob":[1,2,"django-unicorn-float-0.0"]}}'
     actual = serializer.dumps({"name": {"blob": [1, 2, 0.0]}})
 
     assert expected == actual
 
 
 def test_nested_list_float_complicated():
-    expected = '{"another":[{"great":"1.0","ok":["1.6","0.0",4]}],"more":["1.9",2,5],"name":{"blob":[1,2,"0.0"]}}'
+    expected = '{"another":[{"great":"django-unicorn-float-1.0","ok":["django-unicorn-float-1.6","django-unicorn-float-0.0",4]}],"more":["django-unicorn-float-1.9",2,5],"name":{"blob":[1,2,"django-unicorn-float-0.0"]}}'
     actual = serializer.dumps(
         {
             "name": {"blob": [1, 2, 0.0]},
@@ -687,7 +687,7 @@ def test_nested_list_float_complicated():
 
 
 def test_nested_list_float_less_complicated():
-    expected = '{"another":[{"great":"1.0","ok":["1.6","0.0",4]}]}'
+    expected = '{"another":[{"great":"django-unicorn-float-1.0","ok":["django-unicorn-float-1.6","django-unicorn-float-0.0",4]}]}'
     actual = serializer.dumps(
         {
             "another": [{"great": 1.0, "ok": [1.6, 0.0, 4]}],
@@ -697,6 +697,13 @@ def test_nested_list_float_less_complicated():
     assert expected == actual
 
 
+def test_float_loading():
+    expected = {"name": 0.0}
+    actual = serializer.loads('{"name":"django-unicorn-float-0.0"}')
+
+    assert expected == actual
+
+
 def test_pydantic():
     from pydantic import BaseModel