我在django模型中有使用json_array_elements
函数的类方法。
如果它通过浏览器执行它可以正常工作。
但在测试中失败了。
python manage.py test
Traceback (most recent call last):
File "path_to_project/dj_server/model_animations/tests.py", line 94, in test_cteating
response_first = model_animations.views.get_animations_list(request, groupid)
File "path_to_project/dj_server/model_animations/views.py", line 37, in get_animations_list
for model_anim in listArray:
File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 1535, in __iter__
query = iter(self.query)
File "/Library/Python/2.7/site-packages/django/db/models/sql/query.py", line 76, in __iter__
self._execute_query()
File "/Library/Python/2.7/site-packages/django/db/models/sql/query.py", line 90, in _execute_query
self.cursor.execute(self.sql, self.params)
File "/Library/Python/2.7/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/Library/Python/2.7/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/Library/Python/2.7/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
ProgrammingError: function json_array_elements(text) does not exist
LINE 1: ...on_name FROM model_animations_model, json_array...
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
models.py 中的
def get_animations_list(request,group_id):
... 已安装:
在views.py中@classmethod
def animations_list(self, group_id):
if group_id:
try:
listArray = ModelAnimationList.objects.raw(('SELECT * FROM model_animations_model, json_array_elements(animated_groups) AS data WHERE \'"%s"\' = data::text' %group_id))
return listArray
except:
pass
return None
test.py中listArray = ModelAnimationList.animations_list(group_id)
if listArray:
for model_anim in listArray:
if model_anim:
anim_dict = { 'a_id' : model_anim.id, 'a_name' : model_anim.animation_name }
result_anim_list.append(anim_dict)
...
request = HttpRequest()
response_first = model_animations.views.get_animations_list(request, groupid)
python 2.7
Django 1.7.1
Postgres 9.3.5
psycopg2 2.5.4
Mac 10.10优胜美地
答案 0 :(得分:8)
查询json_array_elements(animated_groups)
需要改变这个:
json_array_elements(animated_groups::json)
答案 1 :(得分:1)
Postgres JSON处理功能(例如json_array_elements(animated_groups::json)
,jsonb_array_elements(animated_groups::jsonb)
将采用json
或jsonb
值。
因为postgres JSON字段(animated_groups
)以文本格式或二进制格式存储。
因此我们需要使用::json
或::jsonb
转换类型,以提供json或jsonb格式
检查here