Django:不能包含ManyToManyField字段,因为手动指定"直通"模型

Question

我google了很多次,发现只有一个解决方案,通过第三个模型为两个模型添加自定义中间模型.我像往常一样应用了建议,但仍然遇到这个问题:

不能包含ManyToManyField字段'terms',因为'terms'手动指定'through'模型

models.py

class Term(models.Model):
    class Meta:
        db_table = "tbl_term"

    name = models.CharField(max_length=32)

class Post(models.Model):
    class Meta:
        db_table = "tbl_post"

    title = models.CharField(max_length=96)
    content = models.TextField()

    terms = models.ManyToManyField("Term", through="TermRelation")

class TermRelation(models.Model):
    class Meta:
        db_table = "tbl_term_relation"

    term = models.ForeignKey("Term", db_column="id_term")
    post = models.ForeignKey("Post", db_column="id_post")

admin.py

@admin.register(Term)
class AdminTerm(admin.ModelAdmin):
    fieldsets = [
        (None, {'fields': ['name']})
    ]

@admin.register(Post)
class AdminPost(admin.ModelAdmin):
    fieldsets = [
        (None, {'fields':['title', 'content', 'terms']})
    ]

Answer 1

您必须更改管理员以包含InlineModelAdmin对象

所以,改变

class AdminPost(admin.ModelAdmin):
    fieldsets = [
        (None, {'fields':['title', 'content', 'terms']})
    ]

至

class TermInlineAdmin(admin.TabularInline):
    model = Post.terms.through


class AdminPost(admin.ModelAdmin):
    fieldsets = [
        (None, {'fields':['title', 'content']})
    ]

    inlines = (TermInlineAdmin,)