Re: How to select the proper column when I use ForeignKey?

On Mon, Nov 27, 2017 at 5:30 PM, Matemática A3K <matematica.a3k@gmail.com> wrote:

On Mon, Nov 27, 2017 at 10:50 AM, Kubilay Yazoğlu <kyazogluu@gmail.com> wrote:

Thanks for your answer. I have one more question. What if there are more than one primary keys in that table?

By definition, that won't happen, a primary key is unique. If you add a record with the same key Django will raise an IntegrityError.

 

I'm talking about the unique_together case.

I don't understand you

The ForeignKey uses the model's auto primary key to "link", if you define other keys, np. You should read https://docs.djangoproject.com/en/1.11/ref/models/fields/#foreignkey

The __str__() representation of the object is independent of the keys you define on it. If you want to tweak what is displayed in the drop-down, use this method to show whatever you need :)

 

 

27 Kasım 2017 Pazartesi 08:55:45 UTC+3 tarihinde Matemática A3K yazdı:

What Django shows in that dropdown is the __str__() method of the object, define it to your needs in A :)

On Sun, Nov 26, 2017 at 7:49 PM, Kubilay Yazoğlu <kyaz...@gmail.com> wrote:

Hello. I have two models. In one of them, I declared a foreign key to the other one. Since this is done in Django by only specifying the Class name, without specifying the field name(column name), when I try to create an object in admin panel, it pulls the wrong column information.

Two models A and B.

B has a Foreignkey for accessing A.

A has two fields Field1 and Field2.

When I try to create an instance of B, in the field of Foreignkey, there is a drop down menu but the content is not from the right field of A.

How to specify it?

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