Django Rest Serializer：反向关系(Django Rest Serializer: Reverse relationships)

 免责声明：我正在学习django，因为我将它应用于我继承的数据库/ PHP应用程序。 数据库有点混乱，没有外键约束，命名也不一致。 我不想触摸或重做数据库上的任何内容，因为我根本不想使用遗留应用程序。 
 
 Stack：Python 2.7。 Django 1.5，Django Rest Framework 
 
 问题是我有一个关系，其中有一个具有多个代码的Idea。 代码表有想法的外键（teaser_id），所以我们有类似的东西 
 
**Tickers**
id teaser_id 
1  1
2  1
3  1
4  2
4  2 

**Ideas**
id
1
2
 
 我让django从数据库生成模型，但没有FK约束，它没有正确生成所有关系。 所以这里有模型配置： 
 
class Tickers(models.Model):
    id = models.IntegerField(primary_key=True)

    # I changed to this
    teaser_id = models.ForeignKey(Idea)
    # From        
    # teaser_id = models.IntegerField(null=True, blank=True)

    ticker = models.CharField(max_length=135L, blank=True)
    date_added = models.CharField(max_length=135L, blank=True)
    class Meta:
        db_table = 'teaser_tickers'


class Idea(models.Model):
    id = models.IntegerField(primary_key=True)
    industry_id = models.IntegerField()
    post_type = models.CharField(max_length=45L)

    class Meta:
        db_table = 'idea'
 
 这是我的序列化器 
 
class TickerSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = myModels.Tickers
        fields = (
            'id'
            ,'teaser_id'
            ,'ticker'
        )

class IdeaSerializer(serializers.HyperlinkedModelSerializer):
    user = UserSerializer(many=False, read_only=True)
    ticker = TickerSerializer(many=True, read_only=True, )
    teaser = myFields.TeaserField(teaser_length=200, original_field='content')

    class Meta:
        model = myModels.Idea
        fields = (
            'id'
            , 'title'
            , 'date_added'
            , 'user'
            , 'teaser'
            , 'ticker'
        )
 
 我希望Ideas Resource将代码作为子节点集返回。 
 
 REST请求用于Idea，其中代码是子元素。 所以我得到一个例外，即故障定义没有在想法中定义。 很好 - 但我只是猜测如何在这一点上设置它 - 我通过文档和源代码进行了抨击 - 但希望有人可以帮助我。 
 
 谢谢 

Disclaimer: I am learning django as I apply it to a database / PHP app i inherited. The database is a bit of a mess, with no foreign key constrains, and inconsistent naming. I do not want to touch or redo anything on the database because I don't want to mes with the legacy application at all.
 
Stack: Python 2.7. Django 1.5, Django Rest Framework
 
The problem is that I have a relationship where there is an Idea that has multiple Tickers. The tickers table has the foreign key to the ideas (teaser_id) so that we have something like
 
**Tickers**
id teaser_id 
1  1
2  1
3  1
4  2
4  2 

**Ideas**
id
1
2
 
I had django generate the model from the database, but without the FK Constraints it didn't generate all the relationships properly. So here is haw the models are configured:
 
class Tickers(models.Model):
    id = models.IntegerField(primary_key=True)

    # I changed to this
    teaser_id = models.ForeignKey(Idea)
    # From        
    # teaser_id = models.IntegerField(null=True, blank=True)

    ticker = models.CharField(max_length=135L, blank=True)
    date_added = models.CharField(max_length=135L, blank=True)
    class Meta:
        db_table = 'teaser_tickers'


class Idea(models.Model):
    id = models.IntegerField(primary_key=True)
    industry_id = models.IntegerField()
    post_type = models.CharField(max_length=45L)

    class Meta:
        db_table = 'idea'
 
Here are my serializers
 
class TickerSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = myModels.Tickers
        fields = (
            'id'
            ,'teaser_id'
            ,'ticker'
        )

class IdeaSerializer(serializers.HyperlinkedModelSerializer):
    user = UserSerializer(many=False, read_only=True)
    ticker = TickerSerializer(many=True, read_only=True, )
    teaser = myFields.TeaserField(teaser_length=200, original_field='content')

    class Meta:
        model = myModels.Idea
        fields = (
            'id'
            , 'title'
            , 'date_added'
            , 'user'
            , 'teaser'
            , 'ticker'
        )
 
I want the Ideas Resource to return the tickers as a child node set.
 
The REST request is for the Idea where the tickers is a child element. So I am getting an exception that ticker isn't defined in idea. Fine get that - but I am just guessing on how to set this up at this point - I am sludging through documentation and source - but was hoping someone could help me out.
 
THank you

原文：https://stackoverflow.com/questions/19326327