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);

    }