1071 Fix compare_dicts for numeric values (#1077)

* fix `compare_dicts` for numeric values

* version pin esmerald for now

Author: dantownsend

piccolo/apps/asgi/commands/new.py

@@ -15,7 +15,7 @@
     "fastapi": ["fastapi>=0.112.1"],
     "blacksheep": ["blacksheep"],
     "litestar": ["litestar"],
-    "esmerald": ["esmerald"],
+    "esmerald": ["esmerald==3.3.0"],
     "lilya": ["lilya"],
 }
 ROUTERS = list(ROUTER_DEPENDENCIES.keys())

piccolo/apps/migrations/auto/diffable_table.py

@@ -40,10 +40,17 @@ def compare_dicts(
 
     for key, value in dict_1.items():
         dict_2_value = dict_2.get(key, ...)
+
         if (
-            dict_2_value is not ...
-            and dict_2_value != value
-            or dict_2_value is ...
+            # If the value is `...` then it means no value was found.
+            (dict_2_value is ...)
+            # We have to compare the types, because if we just use equality
+            # then 1.0 == 1 is True.
+            # See this issue:
+            # https://github.com/piccolo-orm/piccolo/issues/1071
+            or (type(value) is not type(dict_2_value))
+            # Finally compare the actual values.
+            or (dict_2_value != value)
         ):
             output[key] = value
 

tests/apps/migrations/auto/integration/test_migrations.py

@@ -888,6 +888,25 @@ def test_column_type_conversion_float_decimal(self):
             ]
         )
 
+    def test_column_type_conversion_integer_float(self):
+        """
+        Make sure conversion between ``Integer`` and ``Real`` works - related
+        to this bug:
+
+        https://github.com/piccolo-orm/piccolo/issues/1071
+
+        """
+        self._test_migrations(
+            table_snapshots=[
+                [self.table(column)]
+                for column in [
+                    Real(default=1.0),
+                    Integer(default=1),
+                    Real(default=1.0),
+                ]
+            ]
+        )
+
     def test_column_type_conversion_json(self):
         self._test_migrations(
             table_snapshots=[

tests/apps/migrations/auto/test_diffable_table.py

@@ -73,6 +73,19 @@ def test_enum_values(self):
         response = compare_dicts(dict_1, dict_2)
         self.assertEqual(response, {"a": OnDelete.set_default})
 
+    def test_numeric_values(self):
+        """
+        Make sure that if we have two numbers which are equal, but different
+        types, then they are identified as being different.
+
+        https://github.com/piccolo-orm/piccolo/issues/1071
+
+        """
+        dict_1 = {"a": 1}
+        dict_2 = {"a": 1.0}
+        response = compare_dicts(dict_1, dict_2)
+        self.assertEqual(response, {"a": 1})
+
 
 class TestDiffableTable(TestCase):
     def test_subtract(self):