interface builder - Relationships vs. Attributes in Core Data -

-

Overall, I love core data yet, but there is a pigment in the system that I'm coming back, And the problems that arise when I decide to use relationships instead of attributes.

For example, using cars, let me have the car unit and the manufacturer unit. Ideally, I can have a relationship between them, many cars with a manufacturer, and then when I'm setting up an editing page for cars, choose the manufacturer in NSPopUpButton User for It works, but it does not appear to save any value, so when I reload the editing page for that particular car, the manufacturer appears empty.

Another option to save the data is to make the manufacturer an attribute, and then set the form to the same form (the manufacturer code which is fed into a NSPopUpButton list) Protects the creator in the car's data, but there is no inconsequential connection to connecting the manufacturer back, which is less than ideal.

How do you make the most effective use of relationships and attributes in core data? Apart from this, how do you solve the above mentioned questions, so that you make connections, but the names of the linked items are displayed instead of "no data" or fault notice?

Have you seen this problem only with your NSPopUpButton user interface? It is possible that you have not properly configured your binding, in core data, enough to assign an example of a suitable unit for a relationship. You will not need a different feature to store the relationship.

The first thing I will investigate is that the chosen object is bound to the right relationship.


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