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Questions tagged [nspredicate]

The NSPredicate class is used in Mac OS X and iOS development to define logical conditions used to constrain a search either for a fetch or for in-memory filtering.

The NSPredicate class is used in Mac OS X and iOS development to define logical conditions used to constrain a search either for a fetch or for in-memory filtering.

An example predicate:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(lastName like[cd] %@) AND (birthday > %@)", lastNameSearchString, birthdaySearchDate];

Multiple predicates can be combined into a more complex predicate with NSCompoundPredicate.

Full reference available in Apple's docs for NSPredicate. Also refer to the Predicate Programming Guide.

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NSPredicate search for join table with nil values

I'm running a predicate search on a table called Todolists. Todolists have todos. I'm attempting to get all Todolists where the due_at (Date) is <= a certain Date or where the due_at Date is nil. The following predicate works fine, and gets all…
Brian Weinreich
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Core data search through 2 relationships

I have 3 entities: Person, Region, and Boundary. Boundary has an attribute of 'state'. A person can have many regions. A region can have many boundaries: Person <<-->> Region <<-->> Boundary.state With a Person entity, I would like to find out all…
Padin215
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Filtering an NSArray with NSPredicate

I have an NSArray that I would like to filter with a predicate. Here is what I have. NSLog(@"text is %@",txtSearch.text); NSPredicate *bPredicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] '%@'",txtSearch.text]; arrSearchedPlayers…
Steaphann
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NSPredicate Query (KVC) on Collections Containing Collections

Edit (I missed a layer of detail): each teacher has an array of classes. (I ran the JSON through a validator, too, so it's a little easier to read) Assume the following JSON: { "schools": [ { "schoolID": "01", "schoolName":…
Gregory Hill
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NSPredicate comparing transformed CLPlacemark with another CLPlacemark

I'm saving CLPlacemark in Core data using NSValueTransformer. (so it's saved as NSData) However I've come to a point where I need to filter the saved objects based on another CLPlacemark object. I've tried this, it doesn't work: NSExpression…
Devfly
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Filtering File Paths Using NSPredicate

I'm trying to filter an array of file paths of the format [number]_[number].png and get only the ones starting with a specific number, say 1. This is what I tried: NSPredicate *predicate = [NSPredicate predicateWithFormat: …
Ata01
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Searching CoreData relationships

I'm about to pull my hair out trying to figure out why this isn't working. I have two entities: Quote Customer A Quote has a one-to-one relationship property with a Customer called simply 'customer'. The Customer has a CoreData objectID…
random
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How to filter array using NSPredicate such that value of one property is greater than other?

I have an array of objects which two properties X and Y (both NSString). I want to filter the array using predicate such that all the filtered objects have X > Y. Currently, I am using: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(X…
Deep Arora
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How to filter SQL results by nspredicate date?

I am trying to filter sql lite database results by date but I am awful at ios date and time objects and not really sure how to do that. How would you set the NSPredicate to filter result by today, last 7 days, last 30 days and last 90 days? Thanks
user2067051
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Inefficient CoreData IN Query

I've got what should be a pretty simple CoreData setup that looks like this: Track { NSSet *artists; NSSet *genres; } Artist { NSSet *tracks; } Genre { NSSet *tracks; } So the idea here is, a Track can have multiple Genres and…
Tim
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NSPredicate created with format and va_list/NSArray failed but string success

I created categories of NSManagedObject such as create, count and else. All of them works find except for following @interface NSManagedObject(ManagedObjectExtension) + (id)findWithPredicate:(id)stringOrPredicate, ...; @end @implementation…
Tar_Tw45
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searching for a keyword in db in my iphone App

I want to know how can i implement keyword searching in my app. Actually i want to enter a text (in uitextfield ), then search my sqlite db and find out corresponding text in db.Iam a new bee to iPhone development, waiting for your help. Remember,…
Mumthezir VP
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NSPredicate to filter nested CoreData Models

I'm having a CoreData models like bellow: Country <---->>> City (One-to-many relationship) Listed into a UITableView as section/row structure i.e. ===Egypt=== Cairo Alexandria Luxur Ras AlBar . . ===Qatar=== Doha . . . Now I have UISearchBar that…
Shady Elyaski
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Core Data - Find out if a relationship between two objects exists

I'm making an app with a questionnaire in it and I'm using Core Data to hold all of its data. There are three entities: Person (the person taking taking the questionnaire), Question (the question), QuestionResult (The result for a question) Person…
Mark Bridges
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IOS: Merging two NSArrays while updating properties of "duplicates"

EDIT: Huge edit, sorry for causing confusion! I'm currently working on an app wherein I get 2 arrays from a JSON WebService using two different methods. In the first array, I get the local stock. In the second array I get the supplier stock. Though…
blaa
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