Django:传递多个参数的 RawQuerySet 问题
我使用了这个问题的答案:
但有一些问题。
我有 params:
params = {'film_id_string': 'core_film.parent_id', 'tags_params': 'comedy', 'order_by': 'core_film.title', 'content_type': '18', 'language_code': 'en'}
对于 SQL 查询:
query = 'SELECT DISTINCT "core_object".*, "core_film".* FROM "core_film" INNER JOIN "core_object" ON ("core_film"."parent_id" = "core_object"."id") LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = %(film_id_string)s) LEFT OUTER JOIN "tagging_taggeditem" ON ("tagging_taggeditem"."object_id" = "core_objectlocalized"."id") LEFT OUTER JOIN "tagging_tag" ON ("tagging_tag"."id" = "tagging_taggeditem"."tag_id") WHERE "tagging_tag"."name" IN (%(tags_params)s) AND "core_objectlocalized"."LANG"=%(language_code)s AND content_type_id=%(content_type)s ORDER BY %(order_by)s'
当我尝试使用 RawQuerySet 时,
films = Film.objects.raw(query, params)
我得到:
SELECT DISTINCT "core_object".*, "core_film".*
FROM "core_film"
INNER JOIN "core_object" ON ("core_film"."parent_id" = "core_object"."id")
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = E\'core_film.parent_id\')
LEFT OUTER JOIN "tagging_taggeditem" ON ("tagging_taggeditem"."object_id" = "core_objectlocalized"."id")
LEFT OUTER JOIN "tagging_tag" ON ("tagging_tag"."id" = "tagging_taggeditem"."tag_id")
WHERE "tagging_tag"."name" IN (E\'comedy\')
AND "core_objectlocalized"."LANG"=E\'en\'
AND content_type_id=E\'18\'
ORDER BY E\'core_film.title\'
问题是,每个带有 'E\'
的地方都会生成与此类似的错误:
DatabaseError: invalid input syntax for integer: "core_film.parent_id"
LINE 1: ...calized" ON ("core_objectlocalized"."parent_id" = E'core_fil...
如何解决此问题?
Django 版本 1.2.3。
编辑
我无法删除引号,因为我使用字符串:
result = self.function(result, tag, "core_film.parent_id")
def function(self, objects, tags, film_id_string):
我的 RawQuerySet 参数如下所示:
params = {'film_id_string': film_id_string}
当我尝试解析此内容时,我得到:
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = E\'core_film.parent_id\')
然后我遇到问题
DatabaseError: invalid input syntax for integer: "core_film.parent_id"
LINE 1: ...calized" ON ("core_objectlocalized"."parent_id" = E'core_fil...
,但是,当我使用字符串格式时,
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = %s)' % film_id_string
它可以工作:
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = core_film.parent_id)
我想省略SQL注入的可能性,因此基于 Django 文档 我不想传递带有字符串格式的参数。
我还能做什么?
I've used answer from this question:
Django: making raw SQL query, passing multiple/repeated params?
but have some problems.
I have params:
params = {'film_id_string': 'core_film.parent_id', 'tags_params': 'comedy', 'order_by': 'core_film.title', 'content_type': '18', 'language_code': 'en'}
for SQL query:
query = 'SELECT DISTINCT "core_object".*, "core_film".* FROM "core_film" INNER JOIN "core_object" ON ("core_film"."parent_id" = "core_object"."id") LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = %(film_id_string)s) LEFT OUTER JOIN "tagging_taggeditem" ON ("tagging_taggeditem"."object_id" = "core_objectlocalized"."id") LEFT OUTER JOIN "tagging_tag" ON ("tagging_tag"."id" = "tagging_taggeditem"."tag_id") WHERE "tagging_tag"."name" IN (%(tags_params)s) AND "core_objectlocalized"."LANG"=%(language_code)s AND content_type_id=%(content_type)s ORDER BY %(order_by)s'
When I tried to use RawQuerySet
films = Film.objects.raw(query, params)
I get:
SELECT DISTINCT "core_object".*, "core_film".*
FROM "core_film"
INNER JOIN "core_object" ON ("core_film"."parent_id" = "core_object"."id")
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = E\'core_film.parent_id\')
LEFT OUTER JOIN "tagging_taggeditem" ON ("tagging_taggeditem"."object_id" = "core_objectlocalized"."id")
LEFT OUTER JOIN "tagging_tag" ON ("tagging_tag"."id" = "tagging_taggeditem"."tag_id")
WHERE "tagging_tag"."name" IN (E\'comedy\')
AND "core_objectlocalized"."LANG"=E\'en\'
AND content_type_id=E\'18\'
ORDER BY E\'core_film.title\'
Problem is, that every place with 'E\'
generate error similar to this:
DatabaseError: invalid input syntax for integer: "core_film.parent_id"
LINE 1: ...calized" ON ("core_objectlocalized"."parent_id" = E'core_fil...
How can I fix this?
Django version 1.2.3.
edit
I can't remove quotes, because I work with string:
result = self.function(result, tag, "core_film.parent_id")
def function(self, objects, tags, film_id_string):
My params for RawQuerySet look like this:
params = {'film_id_string': film_id_string}
When I try to parse this I get:
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = E\'core_film.parent_id\')
and then I have problems with
DatabaseError: invalid input syntax for integer: "core_film.parent_id"
LINE 1: ...calized" ON ("core_objectlocalized"."parent_id" = E'core_fil...
but, when I use string formatting
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = %s)' % film_id_string
it works:
LEFT OUTER JOIN "core_objectlocalized" ON ("core_objectlocalized"."parent_id" = core_film.parent_id)
I want to ommit posibility of SQL injection, so basing on Django docs I don't want to pass params with string formatting.
What can I else do?
如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱,如果其他用户或者作者回复了您的评论,将不能在第一时间通知您!
发布评论
评论(1)
Django 通过转义参数来防止 SQL 插入。这是一个 SQL 语句,因此它不起作用这一事实是一件好事 - Django 正在完成它的工作。除非系统用户将设置“film_id_string”的值,否则您为使其正常工作所做的操作应该没问题。如果不是,那么您仍必须使用“...%s)' % film_id_string...”方法,但创建您自己的自定义过滤器以验证它是否是正确的允许值之一。
Django prevents SQL interjection by escaping parameters. This is an SQL statement, therefore the fact that it does not work is a good thing - Django is doing it's job. Unless the users of the system will be setting the value for "film_id_string" what you did to get it to work should be ok. If not, then you would have to still used the "...%s)' % film_id_string..." method but create your own custom filter to validate that it is one of the correct allowed values.