JSON Diff

An ColdFusion utility for checking if 2 JSON objects have differences

Important: JSON Objects NOT Serialized JSON Strings (Please de-serialize them first)

License

Apache License, Version 2.0.

System Requirements

• Lucee 5+
• Adobe ColdFusion 2016 (Deprecated)
• Adobe ColdFusion 2018+

Installation

Use CommandBox CLI to install:

box install jsondiff

Installation

property name="JSONDiff" inject="JSONDiff"; //wirebox
/* or (dot) folder path to the cfc */
JSONDiff = new path.to.the.cfc.JSONDiff(); //Instantiate Object

Methods

JSONDiff.diff(origData, newData [, ignored array of keys])
JSONDiff.diffByKey(origData, newData, uniqueKey [, ignored array of keys])
JSONDiff.isSame(origData, newData [, ignored array of keys])

Usage

---

Diff (origData, newData [, ignored array of keys])

Call JSONDiff.diff to get a detailed list of changes made between the JSON objects.

    // JSONDiff.diff(origData, newData [, ignored array of keys])
    JSONDiff.diff(
        { test: ["test", { test: true }] },
        { test: ["test", { test: false }] }
    ));

    //Result
    [
        {
            "type": "CHANGE",
            "path": ["test", 2, "test"],
            "old": true,
            "new": false,
        },
    ]

    /*
        Diff with ignored keys
        If you provide an array of ignored keys, the diff function will 
        skip comparison on those keys
    */

    JSONDiff.diff(
        { test: ["test", { test: true }] },
        { test: ["test", { test: false }], dirty:true }
        ['dirty'] //Ignored Keys
    ));

    //Result
    [
        {
            "type": "CHANGE",
            "path": ["test", 2, "test"],
            "old": true,
            "new": false,
        },
    ]

DiffByKey (origData, newData, uniqueKey [, ignored array of keys])

Call JSONDiff.diffByKey to get a detailed list of changes based on a unique key

Great for comparing 2 arrays of structs

    // JSONDiff.diffByKey(origData, newData, uniqueKey [, ignored array of keys])

    JSONDiff.diffByKey(
        [
            {'id':26,'x':480,'y':0},
            {'id':28,'x':482,'y':10},
            {'id':32,'x':480,'y':12}
        ],
        [
            {'id':25,'x':10,'y':0},
            {'id':65,'x':298,'y':0},
            {'id':32,'x':415,'y':2}
        ],
        'id'
    );

    //Result
    {
        "REMOVE": [{
            "data": {"y": 0,"x": 298,"id": 65 },
            "key": 65
        }, {
            "data": { "y": 0, "x": 10, "id": 25 },
            "key": 25
        }],
        "UPDATE": [{
            "changes": [
                { "path": ["y"], "key": "y", "old": 2, "new": 12 }, 
                { "path": ["x"], "key": "x", "old": 415, "new": 480 }
            ],
            "key": "32",
            "oldData": { "y": 2, "x": 415, "id": 32 },
            "newData": { "y": 12, "x": 480, "id": 32  }
        }],
        "ADD": [{
            "data": { "y": 10, "x": 482, "id": 28 },
            "key": 28
        }, {
            "data": { "y": 0, "x": 480, "id": 26 },
            "key": 26
        }]
    }

isSame (origData, newData [, ignored array of keys])

Call JSONDiff.isSame to get a simple boolean true or false.

    JSONDiff.isSame(
        { test: ["test", { test: true }] },
        { test: ["test", { test: false }] }
    ))

    //Result
    false

License

This library is distributed under the apache license, version 2.0

Copyright 2021 Scott Steinbeck; All rights reserved.

Licensed under the apache license, version 2.0 (the "license"); You may not use this library except in compliance with the license. You may obtain a copy of the license at:

http://www.apache.org/licenses/license-2.0

Unless required by applicable law or agreed to in writing, software distributed under the license is distributed on an "as is" basis, without warranties or conditions of any kind, either express or implied.

See the license for the specific language governing permissions and limitations under the license.