C

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. C

#include <C_CkJsonObject.h>
#include <C_CkJsonArray.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    HCkJsonObject menu;
    HCkJsonArray catArr;
    int index;

    success = FALSE;

    //  This example will delete the "Pasta" category object from Menu B.

    //  {
    //    "menus": [
    //      {
    //        "name": "Menu A",
    //        "categories": [
    //  			{
    //  			"name": "Kebabs",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Burgers",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Pasta",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Appetizers",
    //  			"description": "blah blah blah"
    //  			}
    //  		]
    //  	},
    //      {
    //        "name": "Menu B",
    //        "categories": [
    //  			{
    //  			"name": "Kebabs",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Burgers",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Pasta",
    //  			"description": "blah blah blah"
    //  			},
    //  			{
    //  			"name": "Appetizers",
    //  			"description": "blah blah blah"
    //  			}
    //  		]
    //  	  }
    //  	]
    //  }

    json = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(json,"qa_data/json/menus.json");
    if (success == FALSE) {
        printf("%s\n",CkJsonObject_lastErrorText(json));
        CkJsonObject_Dispose(json);
        return;
    }

    //  Find Menu B.
    menu = CkJsonObject_FindRecord(json,"menus","name","Menu B",TRUE);
    //  assume menu is found..

    //  Get the categories array, and then find the index of the "Pasta" menu category.
    catArr = CkJsonObject_ArrayOf(menu,"categories");
    //  Assume it is found..

    //  Find the object where the name of the JSON member is "name", and the value is "Pasta"
    index = CkJsonArray_FindObject(catArr,"name","Pasta",TRUE);
    if (index < 0) {
        printf("Pasta not found.\n");
    }
    else {

        //  Delete the "Pasta" category record from Menu B
        success = CkJsonArray_DeleteAt(catArr,index);
        //  Assume OK..
    }

    //  Examine the JSON to see if it worked as expected..
    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    CkJsonArray_Dispose(catArr);
    CkJsonObject_Dispose(menu);


    CkJsonObject_Dispose(json);

    }