Databases
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PO
 

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  1. PO
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    <p>The <code>getObjectInBackgroundWithId:block:</code> expects a Parse object ID for the <code>objectId</code> parameter.</p> <p>If you're simply creating the object and then trying to pass it through to a child view controller, it might be better to pass through the actual <code>PFObject</code>.</p> <pre><code>//In your header @property (nonatomic, strong) PFObject *message; //Implementation (IBAction)createGroup:(id)sender { PFObject *message = [PFObject objectWithClassName:@"Messages"]; [message setObject:self.recipients forKey:@"recipientIds"]; [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if (error) { NSLog(@"Error %@ %@", error, [error userInfo]); } else { self.message = message; [self performSegueWithIdentifier:@"showDate" sender:self]; } }]; } </code></pre> <p>You'll need to implement <code>prepareForSeque:sender:</code> in your view controller, and then pass the PFObject through to the child view controller:</p> <pre><code>- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"showDate"]) { YourChildViewController *destViewController = segue.destinationViewController; destViewController.message = self.message; } } </code></pre> <p>Then in your child view controller:</p> <pre><code>//In the header, create a property to hold the message object @property (nonatomic, strong) PFObject *message; //In the body, you can use self.message [self.message setObject:file forKey:@"file"]; [self.message setObject:fileType forKey:@"fileType"]; [self.message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { ... </code></pre>
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    1. This table or related slice is empty.
    1. POError: no results matched the query
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    1. USalxmitch
    1. USalxmitch
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    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. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COok, I'm getting an "expected expression" warning on the line for the "else" statement. should self.objectId be moved down to be included in the else statement?
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      1. USJared Gross
    2. COAh, sorry. You're right - that should be in the else block. You'll also need to add a property to your class to hold the object ID (to allow you do to `self.objectId`. I've edited my answer to show this.
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    3. COI appreciate your help. Now the app is terminating at the same spot and I am getting this thrown 'Cannot do a comparison query for type: (null)' I guess I'm not really understanding.
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      1. USJared Gross
 

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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.

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