Mapping to one CoreData attribute from a collection of elements using RestKit RKDynamicMapping -


i trying map 1 coredata attribute following json:

{ "products": [     {         "stock": {             "instock": true,             "instockbeforemaxadvanceorderingdate": false         },         "url": "xxxxxxxxxxx",         "manufacturer": "demo",         "images": [             {                 "format": "thumbnail",                 "imagetype": "primary",                 "url": "/imageurl/xx.jpg"             },             {                 "format": "thumbnailgrid",                 "imagetype": "primary",                 "url": "/imageurl/xxx.jpg"             }         ],         "productfees": [             [                 "empty",                 "0.0"             ]         ],         "name": "demo product"     } ]

}

i trying extract thumbnailgrid image url images collection. in responses have lot of times collection returned interested in 1 field. can setup relationships in coredata , have no problems, because know match 1 resource prefer store in 1 attribute rather relationship.

my product coredata entity has thumbnailimageurl attribute.

my product entity mapping:

rkentitymapping *mapping = [rkentitymapping mappingforentityforname:@"product" inmanagedobjectstore:_managedobjectstore];  [mapping addattributemappingsfromdictionary:@{  @"stock.instock":@"instock",  @"stock.instockbeforemaxadvanceorderingdate":@"instockbeforemaxadvanceorderingdate",  @"url":@"url",  @"manufacturer": @"manufacturer",  @"manufacturername":@"manufacturername",  @"name":@"name",  }];  rkdynamicmapping *dynamicmapping = [rkdynamicmapping new];  [mapping addpropertymapping:[rkrelationshipmapping relationshipmappingfromkeypath:@"images" tokeypath:@"thumbnailimageurl" withmapping:dynamicmapping]];  [dynamicmapping setobjectmappingforrepresentationblock:^rkobjectmapping *(id representation) {     if ([[representation objectforkey:@"format"] isequaltostring:@"thumbnailgrid"]) {         return ???;     }     return nil; }];

i not sure return dynamic mapper when match occurs. shall create rkentitymapping instance map same "product" entity , map url thumbnailimageurl?

also passible add somehow dynamic mapper attribute rather relationship?

thanks,

csaba

i'd store collection , filter out later. or, add method managed object subclass called set collection , filtering there (setting filter result actual attribute). trying restkit kind of filter hard (i'm not sure can it).


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