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Access a UI Part Metadata Item (via JavaScript API)

Owned by admin (Deactivated)
Last updated: Dec 18, 2014
1 min read

When you want the data from a UI Part Metadata Item and you're working in JavaScript, the Aptify JavaScript API provides a handy interface.

Step-by-step guide

  1. Know the Table Name you want to access – not the Name of the UI Part Metadata Item itself, but of one of its Tables that has Include In Data Set checked.

    var upmiTable = "entityCards";

  2. Call Aptify.framework.utility.cache.getMetaData and use the UI Part Metadata Item in the callback.

    Access a UI Part Metadata Item
    Aptify.framework.utility.cache.getMetaData(upmiTable, function (data) {
	// If we end up in the callback, we know that we've succeeded
	// data holds the JSON array tied to the upmiTable key
});

    So, for the Entity Cards array, which has a JSON UI Part that looks like this:

    Entity Cards UI Part Metadata Item JSON
     {"entityCards": 
	[	{"id":"1","name":"Persons Default", ..., 
		 "uiParts":
			[	{"id":"1","entityCardId":"1", ...}
			]
		},
		{"id":"2","name":"Companies Default", ..., 
		 "uiParts":
			[	{"id":"2","entityCardId":"2", ...}
			]
		},
		...
	]
}

    The "data" parameter passed to the callback function will look like this:

    JSON Array From getMetaData()
    [	{"id":"1","name":"Persons Default", ..., 
	 "uiParts":
		[	{"id":"1","entityCardId":"1", ...}
		]
	},
	{"id":"2","name":"Companies Default", ..., 
	 "uiParts":
		[	{"id":"2","entityCardId":"2", ...}
		]
	},
	...
]

    Because getMetaData() is a function that accesses the cache, it's possible for it to return synchronously if the requested metadata is already in the browser's local storage:

    Synchronous Use of getMetaData()
    var data = Aptify.framework.utility.cache.getMetaData(upmiTable); 

    However, you as the programmer are not in control of the cache, so the best practice is to stick to using the function asynchronously.

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