#27267: Migrations: Need API to drop a foreign key constraint
--------------------------------+--------------------------------------
Reporter: Melvyn Sopacua | Owner: nobody
Type: Uncategorized | Status: new
Component: Migrations | Version: 1.8
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by Melvyn Sopacua):
* version: 1.10 => 1.8
Comment:
Updated version. This may be a 1.8 issue.
Just ran into the same beast, different trigger. I renamed a primary key
and runs into the foreign key constraint:
{{{#!python
migrations.RenameField(
model_name='itemtype',
old_name='item_id',
new_name='item_type_id',
),
}}}
Output:
{{{
django.db.utils.InternalError: cannot drop constraint dpe_itemtype_pkey on
table dpe_itemtype because other objects depend on it
DETAIL: constraint
dpe_it_itemtype_ptr_id_3b50b94341daa361_fk_dpe_itemtype_item_id on table
dpe_itemtypepage depends on index dpe_itemtype_pkey
constraint dpe_itemb_item_type_id_5c80224be6efb2ca_fk_dpe_itemtype_item_id
on table dpe_itembase depends on index dpe_itemtype_pkey
HINT: Use DROP ... CASCADE to drop the dependent objects too.
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/27267#comment:3>
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