jsonpath-object-transform

> Transform an object literal using JSONPath.


Pulls data from an object literal using JSONPath and generate a new objects based on a template. Each of the template's properties can pull a single property from the source data or an array of all results found by its JSONPath. When pulling an array of data you can also supply a subtemplate to transform each item in the array.

JSONPath is like XPath for JavaScript objects. To learn the syntax, read the documentation for the JSONPath package on npm and the original article by Stefan Goessner.

Usage

``js
var transform = require('jsonpath-object-transform');

var template = {
foo: ['$.some.crazy', {
bar: '$.example'
}]
};

var data = {
some: {
crazy: [
{
example: 'A'
},
{
example: 'B'
}
]
}
};

var result = transform(data, template);
`
Result:
`js
{
foo: [
{
bar: 'A'
},
{
bar: 'B'
}
]
}
`

Method


`js
jsonPathObjectTransform(data, template);
`
Where data and template are both a plain Object. Returns the transformed Object.

Template Objects

Your template will be an object literal that outlines what the resulting object should look like. Each property will contain a JSONPath String or Array depending on how many properties from the source data you want to assign to the generated object.

$3

`js
{ destination: '$.path.to.source' }
`
Use a String on your template property to assign a single object returned from your JSONPath. If your path returns multiple results then only the first is used.

#### Example
`js
var template = {
foo: '$.example'
};

var data = {
example: 'bar'
};
`
Result:
`js
{
foo: 'bar'
}
`

$3


`js
{ destination: ['$.path.to.sources'] }
`
Use an Array containing a single String to assign all results returned from your JSONPath.

#### Example
`js
var tempalte = {
foo: ['$..example']
};

var data = {
a: {
example: 'bar'
},
b: {
example: 'baz'
}
};
`
Result:
`js
{
foo: ['bar', 'baz']
}
`

$3


`js
{ destination: ['$.path.to.sources', { item: '$.item.path' }] }
`
Use an Array with a String and an Object to assign all results returned from your JSONPath and transform each of the objects with a subtemplate.

#### Example
`js
var template = {
foo: [$..example, {
bar: '$.demo'
}]
};

var data = {
a: {
example: {
demo: 'baz'
}
},
b: {
example: {
demo: 'qux'
}
}
};
`
Result:
`js
{
foo: [
{ bar: 'baz' },
{ bar: 'qux' }
]
}
``