Databases
StackOverflow2013
Postsdbo
POCore Data arraycontroller binding: valueForUndefinedKey
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCore Data arraycontroller binding: valueForUndefinedKey
    primarykey
    data
    text
    <p>all</p> <p>I have a NSTableView as well as a three NSTextFields displayed inside a NSWindow. (in the IB). The entity is designed like this</p> <pre><code>Entity: Data Attributes: Title String URL String UserName String Password String </code></pre> <p>I have successfully bound the NSArrayController to the managedObjectContext, and NSTableView to the arrayController's Title attribute, and the NSTableView can show all the titles correctly.</p> <p>I want to implement the following task:</p> <pre><code>When user click one of the row in the NSTableView, the rest of the three NSTextFields can show the records of that row, respectively URL&lt; username and password. </code></pre> <p>so I do the following for the URL part</p> <p>bind a NSTextField to NSArrayController's selection.URL</p> <p><strong>When i run the program, it gives errors, however, if I uncheck the "Raises for not applicable keys" in the binding property, the program can be successfully launched, and value can be correctly shown in the text field. can anyone explain why?</strong></p> <p>the error says:</p> <pre><code> [&lt;NSTableView 0x102240d60&gt; valueForUndefinedKey:]: this class is not key value coding-compliant for the key URL. </code></pre> <p>Here's the part of error log:</p> <pre><code>2012-01-17 11:52:57.533 Quills[98683:407] An uncaught exception was raised 2012-01-17 11:52:57.534 Quills[98683:407] [&lt;NSTableView 0x102240d60&gt; valueForUndefinedKey:]: this class is not key value coding-compliant for the key URL. 2012-01-17 11:52:57.540 Quills[98683:407] ( 0 CoreFoundation 0x00007fff8abd2286 __exceptionPreprocess + 198 1 libobjc.A.dylib 0x00007fff8d84cd5e objc_exception_throw + 43 2 CoreFoundation 0x00007fff8ac5c4c9 -[NSException raise] + 9 3 Foundation 0x00007fff8d1e8783 -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] + 240 4 Foundation 0x00007fff8d11f462 _NSGetUsingKeyValueGetter + 108 5 Foundation 0x00007fff8d11f3e9 -[NSObject(NSKeyValueCoding) valueForKey:] + 392 6 Foundation 0x00007fff8d13ee76 -[NSObject(NSKeyValueCoding) valueForKeyPath:] + 348 7 AppKit 0x00007fff85ab33f1 -[NSArrayController _multipleValueForKeyPath:atIndex:] + 84 8 AppKit 0x00007fff85ab24e5 -[NSArrayController _singleValueForKeyPath:] + 151 9 AppKit 0x00007fff8581909a -[_NSControllerObjectProxy valueForKeyPath:] + 77 10 Foundation 0x00007fff8d13ee39 -[NSObject(NSKeyValueCoding) valueForKeyPath:] + 287 11 AppKit 0x00007fff85818f46 -[NSBinder _valueForKeyPath:ofObject:mode:raisesForNotApplicableKeys:] + 654 12 AppKit 0x00007fff85818c30 -[NSBinder valueForBinding:resolveMarkersToPlaceholders:] + 171 13 AppKit 0x00007fff85a1cc92 -[NSValueBinder _referenceBindingValue] + 31 14 AppKit 0x00007fff85a1caa3 -[NSValueBinder _adjustObject:mode:observedController:observedKeyPath:context:editableState:adjustState:] + 647 15 AppKit 0x00007fff85a1c788 -[NSValueBinder _observeValueForKeyPath:ofObject:context:] + 303 16 AppKit 0x00007fff85a345af -[NSTextValueBinder _observeValueForKeyPath:ofObject:context:] + 43 17 AppKit 0x00007fff8580abdb -[NSObject(NSKeyValueBindingCreation) bind:toObject:withKeyPath:options:] + 591 </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSheldon Rong
    1. USSheldon Rong
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POCore Data arraycontroller binding: valueForUndefinedKey
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POCore Data arraycontroller binding: valueForUndefinedKey
      1. USArtOfWarfare
      1. VTFavorite
    1. COmake sure you have bound the "URL" key to the arraycontroller
      singulars
      1. POCore Data arraycontroller binding: valueForUndefinedKey
      1. USShanti K
    2. COhi, Shanti, Why? My array controller binds the managedObjectContext and the NSTableView binds the arrangedObject.title from the arrayController, and the URL textfield is supposed to display the URL corresponding to the selected title of from the NSTableView. So when I choose a title in the NSTableView, the "selection" shall refers to this data, thus, selection.URL shall points to the URL attribute, am I making sense? (if not, what property shall I bind this URL to the array controller? - content ?)
      singulars
      1. POCore Data arraycontroller binding: valueForUndefinedKey
      1. USSheldon Rong
    3. CO@Sheldon you're making perfect sense. I'm having the exact same issue.
      singulars
      1. POCore Data arraycontroller binding: valueForUndefinedKey
      1. USArtOfWarfare
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload