修复 display_property 严重的实现错误

fuocore/models.py

@@ -80,17 +80,18 @@ def __init__(self,
 class display_property:
     """Model 的展示字段的描述器"""
     def __init__(self, name):
+        #: display 属性对应的真正属性的名字
         self.name_real = name
-        self.name_display = name + '_display'
-        self.value_display = ""
+        #: 用来存储值的属性名
+        self.store_pname = '_display_store_' + name
 
     def __get__(self, instance, _=None):
         if instance.stage >= ModelStage.inited:
             return getattr(instance, self.name_real)
-        return self.value_display
+        return getattr(instance, self.store_pname, '')
 
     def __set__(self, instance, value):
-        self.value_display = value
+        setattr(instance, self.store_pname, value)
 
 
 class ModelMeta(type):

tests/test_model.py

@@ -1,7 +1,7 @@
 from collections import namedtuple
 from unittest import TestCase
 
-from fuocore.models import Model, BaseModel
+from fuocore.models import Model, BaseModel, display_property
 
 
 class FakeProvider:
@@ -73,3 +73,17 @@ def album_name(self):
         song.album = Album(real_album_name)
         song.use_display = False
         self.assertEqual(song.album_name, real_album_name)
+
+
+class TestDisplayProperty(TestCase):
+    def test_display_basic_usage(self):
+        class A:
+            stage = 4
+            a_display = display_property('a')
+
+        a1 = A()
+        a2 = A()
+        self.assertEqual(a1.a_display, '')
+        a2.a_display = 'a2'
+        self.assertEqual(a1.a_display, '')
+        self.assertEqual(a2.a_display, 'a2')