Django: Generic one-to-many relationship with Contenttypes -

-

I am trying to make the following fit in Django ORM. A model with a publish which manages the publication of different types of content (other models). That's why I can easily Publish.objects.all () and order them according to date. I created a normal model as: 

  publish class (models.Model): "" Intermediate model to display and manage various types of content "" "status = model .interfold (_ ('position'), option = STATUS_CHOICES, default = 1) Publish = Model DataTifield (_ ('Publish'), default = datetime.datetime.now) content_type = model.Forinzee (content) object_id = Models.PositiveIntegerField () Content_object = generic.GenericForeignKey ('content_type', 'object_id')

The problem is that I want to attach it to different models, it should be a OneToMany relationship, because an article can only have a publication date. There is a general relationship, as far as I know, a ManyToMany relationship.

I have tried to limit the max_num and extra generic tabular inline , but this is not a great work solution. Does anyone know Publishing model to add to the number of different models, it is a necessary one-to-many relationships? Many people are published models, which is a paragraph for the former.

Your assumption is incorrect - Generic foreign keys are many from one, many can not see many That your model has fields in content_object and object_id - that is to publish examples of a single target object, although there may be several published examples in that object.

What you really want, it seems, is a one-tone model. You can simulate with the model that you have, you only prohibit the creation of objects to be published. So that only one can be for each object object. You can do this in unique_together at content_type and object_id in the meta sub-category.

class (Models.Model): ... fields ... class meta: unique_together ('content_type', 'object_id')

Another option you might want to consider, instead of using normal relationships, try multi-table model succession, where each object gets published.


Comments

Post a Comment

Popular posts from this blog

c# - How to capture HTTP packet with SharpPcap -

-
I would like to capture all incoming HTTP packets on my machine. To do this, I am using SharpPcap which is a WinPcap The cover is. SharpPcap works very well, but it captures TCP packets and what it wants to do for me is a very low level. Does anyone know how can I easily get full HTTP requests / reactions from all these TCP packets? Thanks SharpPcap is already able to capture the packet in the same way That's what the virus does (just in the code instead of the GUI). And you can either either parse them directly or you can put them in the drive in the common .pcap file format. The steps to parse the capture are: Open a connection at any time Loop a while Or start capturing using an event callback Parsing the raw packet for the type you want If you are reading .PPP dump files In addition to calling you an offline capture reader is almost the same, there is no need to select an interface, and you can set the majority There is no need to do the modes. All st...
Read more

php - Multiple Select with Explode: only returns the word "Array" -

-
By using Wordpress I have created a multiple selection box so that users can select categories to exclude. When the page is initially loaded, I see my predefined default option. However, when I select a new value and I save ... I only see the word "Array" and have not chosen anything else? & lt; Class = "amultiple" id = "& lt; php echo $ value ['id'] ;? gt;" name = "& gt; php echo $ value ['id'] ;; gt; []" Multiple = "multiple" size = "8" & gt; & Lt ;? Php global option; Foreign currency ($ value as value $) {if (get_settings ($ value ['id']) === FALSE {$$ value ['id'] = $ value ['std']; } And {$$ value ['id'] = get_settings ($ value ['id']); }} $ Ranges = & amp; Amp; Categories ('type = post & orderbiz = name & amp; hide_empty = 1'); If ($ ranges) {$ ex_cat = implode (',', $ tt_cat_exclude); Forex Currency ($ range a...
Read more

php - jQuery AJAX Post not working -

-
I do not understand why this script does not work. It has something to do within AJAX PostScript / Function. Right now, when I submit my form, it runs php code on the same page. What it should do, send the values ​​of the form for Project_Azax.fp, then there will be a refund of success on the page which is correct or false. $ (document) .ready (function () {$ ('div # didIt'). Hide (); $ ('form [name = adminForm]'). Submit (function () ($ {'.post' ('/ project_ajax.php', {action: $ ('[name = action]') Val (), pId: $ ('[name = pId]'). Val (), name ('[Name = name]'. Val (), url: $ ('[url = url]'). Val (), summary: ('[summary = summary]'). Val ()}, Function (data) {if (data.success) {$ ('div # didIt') .Sliddown ('slow');} and {warning ('unsuccessful SA!');}}, 'Jason'); return false ;});}); What is the code for project_ajax.php below ... if ($ _ POST ['action'] == ...
Read more