JSON Model - don't add all objects in array if using method "arrayOfModelsFromDictionaries"

Question

Here's my JSON data

[{
    "id": 1,
    "name":"Soup",
    "price":200,
    "isOK":1
},
{
    "id": 2,
    "name":"Salad",
    "price":100,
    "isOK":0
}]

I have created JSONModel as follows

@interface ProductModel : JSONModel
@property (assign, nonatomic) int id;
@property (strong, nonatomic) NSString* name;
@property (assign, nonatomic) float price;
@property (assign, nonatomic) BOOL isOK;
@end

Next,

NSArray* modelsArray = [ProductModel arrayOfModelsFromDictionaries:objects];

Now what I want is

if(isOK)
{
   // then add the model into the modelsArray
} else {
   // then don't add the model into the modelsArray
}

Is it possible to write this logic somewhere within the model file, without iterating the modelsArray and then removing the objects one by one on the basis of isOK ?

are want remove object from modelsArray on the baces of isok value? — balkaran singh, Oct 17 '16 at 08:29
@balkaran singh thats correct, but without iterating the array again — Haider, Oct 17 '16 at 09:57

Himanshu Moradiya · Answer 1 · 2016-10-21T04:34:01.660

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF['isOK'] CONTAINS '1'"];
NSArray* filted_Array_OK = [modelarray filteredArrayUsingPredicate:predicate];
NSLog(@"%@",filted_Array_OK);

NSArray* filted_Array_NOT_OK = [modelarray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF['isOK'] CONTAINS '0'"]];
NSLog(@"%@",filted_Array_NOT_OK);

Here modelArray contains your all values isOK = 0 and isOK = 1

with this code you got 2 different array that contains 2 type value that are isOK = 1 and isOK = 0 now you can use directly array when you want to use .

Output : filted_Array_OK

 (
        {
        id = 1;
        isOK = 1;
        name = Soup;
        price = 200;
    },
        {
        id = 3;
        isOK = 1;
        name = peace;
        price = 900;
    }
)

filted_Array_NOT_OK

(
        {
        id = 2;
        isOK = 0;
        name = cake;
        price = 200;
    },
        {
        id = 4;
        isOK = 0;
        name = bread;
        price = 800;
    }
)

Ok, I was wondering if there could be a function in the model file, which would return true or false and would decide whether the object will be added in the array or not. Anyways thanks for the detailed answer. — Haider, Oct 24 '16 at 15:04
@Haider i just give you 2 array so when ever you want use it you can easily access it . — Himanshu Moradiya, Oct 25 '16 at 04:06

score 2 · Answer 2 · answered Oct 24 '16 at 13:34

Yes, you can use NSPredicate though;

   NSArray* modelsArray = [ProductModel arrayOfModelsFromDictionaries:objects];    
  [NSPredicate predicateWithFormat:@"SELF.isOK == %@ && SELF.isOK != nil", @YES];
   NSArray* filtedArray = [modelsArray filteredArrayUsingPredicate:predicate];

score 1 · Answer 3 · answered Oct 20 '16 at 11:07

1

NSArray* modelsArray = [ProductModel arrayOfModelsFromDictionaries:objects];    
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"isOK == 1"];
NSArray* filtedArray = [modelsArray filteredArrayUsingPredicate:predicate];

answered Oct 20 '16 at 11:07

Bill Xie

105
6

Ok, I was wondering if there could be a function in the model file, which would return true or false and would decide whether the object will be added in the array or not. Thanks for the answer – Haider Oct 24 '16 at 15:04

score 0 · Answer 4 · answered Oct 21 '16 at 04:56

0

Using Fast enumeration you can do this .

for (ProductModel* productModel in objects) {
  if(productModel.isOK){
   [modelarray addOjbect:productModel];
  }
}

answered Oct 21 '16 at 04:56

KKRocks

8,222
1
18
84

what you want to do ? – KKRocks Oct 24 '16 at 15:34

JSON Model - don't add all objects in array if using method "arrayOfModelsFromDictionaries"

4 Answers4