how to store data from array of dictionaries using magical records

Question

I am trying to store data fetched API which is in form of array of dictionaries. I want to store these values in my database. API response stores in an object.

[
  {
    "sort_priority": 1,
    "desc": "",
    "img_url": "",
    "id": 3,
    "name": "First Run"
  },
  {
    "sort_priority": 2,
    "desc": "",
    "img_url": "",
    "id": 4,
    "name": "Shorts"
  },
  {
    "sort_priority": 3,
    "desc": "",
    "img_url": "",
    "id": 1,
    "name": "Animation"
  },
  {
    "sort_priority": 4,
    "desc": "",
    "img_url": "",
    "id": 2,
    "name": "Documentary"
  }
]

I just want to store name and id from this list.

[Categories MR_importFromObject:responseObject];

Categories is an Entity and responseObject is an object returned from API

Are you trying to store record in coreData? If yes, then create an object within Entity of type 'Transformable'. Generate NSManagedObject subclass & replace object type to array. — Gagan_iOS, Jun 08 '16 at 07:44
could you please give me an example? if I run `[Categories MR_importFromObject:responseObject];` it stores data in `name` as `( First Run, Shorts, Animation, Documentary)` — Ahmad Nauman, Jun 08 '16 at 07:50
http://stackoverflow.com/questions/25416132/how-do-you-store-data-from-nsmutable-array-in-core-data - best example ever. — Himanshu padia, Jun 08 '16 at 07:51
Yes, Himanshu has done the job. You can also search for the same e.g. http://lextech.com/2013/01/core-data-transformable-attributes/ — Gagan_iOS, Jun 08 '16 at 07:54
Thanks @himanshupadia and @Gagan_iOS for help. if `name` stores `( First Run, Shorts, Animation, Documentary)`. So how to get each category name in single tableviewcell using indexpath? — Ahmad Nauman, Jun 08 '16 at 07:58
You can store core data in array and fetch it and display in tableview. — Himanshu padia, Jun 08 '16 at 08:50
I have to store this data in database and then have fetch it from there. — Ahmad Nauman, Jun 08 '16 at 09:13

Dinesh Gurrapu · Answer 1 · 2016-06-08T08:59:52.087

0

for (int i=0; i<resultArr.count; i++)
    {
            NSError *error=nil;
            NSManagedObjectContext *context=[self managedObjectContext];
            NSManagedObject *newDevice=[NSEntityDescription insertNewObjectForEntityForName:@"myEntity" inManagedObjectContext:context];


            [newDevice setValue:[[resultArr objectAtIndex:i ]valueForKey:@"name"] forKey:@"name"] ;
            [newDevice setValue:[[resultArr objectAtIndex:i ]valueForKey:@"id"]  forKey:@"id"];


            [newDevice.managedObjectContext save:&error]) 


}

  //For fetchig/////////////////////

  NSError *error;
_dataEntity = [NSEntityDescription entityForName:@"myEntity" inManagedObjectContext:appDelegate.managedObjectContext];
NSFetchRequest * fr = [[NSFetchRequest alloc]init];
[fr setEntity:_dataEntity];
NSMutableArray *namesArr=[[NSMutableArray alloc]init];
NSMutableArray * result = [[appDelegate.managedObjectContext executeFetchRequest:fr error:&error] mutableCopy];
for (unsigned short int i=0;i<result.count;i++)
{
    NSMutableDictionary *coreDataDict=[[NSMutableDictionary alloc] init];
    NSManagedObject *fetchResult=[result  objectAtIndex:i];

    [coreDataDict setValue:[fetchResult valueForKey:@"name"] forKey:@"name"];


    [namesArr addObject:coreDataDict];

}

edited Jun 08 '16 at 08:59

answered Jun 08 '16 at 08:02

Dinesh Gurrapu

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dear @Dinesh when I fetch back data from database its count always be one. when I call `[_movieCategories objectAtIndex:indexPath.row-1]name]`. it returns 1 and `name` contains data something like that `( First Run, Shorts, Animation, Documentary) ` – Ahmad Nauman Jun 08 '16 at 08:45
1st u can add it to dictionary then add that dictionary to the array, finally u can return the array count – Dinesh Gurrapu Jun 08 '16 at 08:53
I am storing data using magical record `[Categories MR_importFromObject:responseObject]; ` and fetching back that data having attribute `name ` from database ` NSArray* movieCategories = [Categories MR_findAll]; ` but when i print count value of this array it returns one `NSLog(@"Category count: %d",movieCategories.count);` – Ahmad Nauman Jun 08 '16 at 09:12
thanks dear it solves my problem `NSArray *responseArray = (NSArray *)responseObject;[Categories MR_importFromArray:responseArray];` – Ahmad Nauman Jun 10 '16 at 10:20

score 0 · Accepted Answer · answered Jun 10 '16 at 10:42

thanks to all my problem has solved by doing this

NSArray *responseArray = (NSArray *)responseObject;
[Categories MR_importFromArray:responseArray];

I had a array of multiple dictionarys in responseObject and want to store only specific values from each dictionary. So I did above mention and it stored positives in database.

how to store data from array of dictionaries using magical records

2 Answers2