nsfetchrequest

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NSPredicate not filtering correctly

I\'m trying to setup a NSPredicate to开发者_Go百科 filter data. I have a property of an entity called code that is in format like 55.534.[详细]

2023-03-28 00:39 分类：问答
fetching core data values using predicate

my sqlite have items in one of the entity and i wish to retrieve them out according to their categoryID[详细]

2023-03-27 12:00 分类：问答
CoreData get distinct values of Attribute

I\'m trying to setup my NSFetchRequest to core data to retrieve the unique values for a specific attribute in an entity.i.e.[详细]

2023-03-26 21:08 分类：问答
How to extract specific attribute from core date store

I\'m executing a fetch request with sort descriptor to populate a mutable array as follows: NSFetchRequest *requestA = [[NSFetchRequest alloc] init];[详细]

2023-03-25 20:41 分类：问答
How to specify Destination for Core Data fetchRequest programmatically?

Im开发者_Go百科 trying to perform a fetch request programmatically to retrieve certain entities from \"EntityA\". However i need toset the Destination for the fetch request to \"EntityB\" for the pred[详细]

2023-03-25 11:24 分类：问答
How to Fetch only Some Objects Matching a Bool Attribute

Every time I fetch objects from the database I get all objects. Now, I have to fetch and show in a table view only some of the objects stored in the database.[详细]

2023-03-25 09:57 分类：问答
Sorting an NSFetchRequest Based on a Property within a One-to-Many Relationship?

I\'ve been prowling through the SO search results and can\'t (thus far) find an answer to this question.[详细]

2023-03-25 06:42 分类：问答
How to fetch property values using attribute from multiple entities in Core Data?

I have three entities like this. Employee: id name EmployeeDepartment: id departmentID employeeID Department:[详细]

2023-03-25 02:28 分类：问答
Checking for duplicate in sqlite before inserting them (Core data)

i\'m inserting new objects into the database by core data. Is there any way to check if there is any duplicate in the database before i insert the values in?[详细]

2023-03-24 22:35 分类：问答
CoreData - fetch does not find objects

I\'m kind of newbie on coredata, and i\'开发者_运维技巧m building a simples database, with the result of an xml.[详细]

2023-03-23 20:07 分类：问答