falcor/lib/get/getBoundValue.js

A JavaScript library for efficient data fetching.

var getValueSync = require("./../get/getValueSync");
var InvalidModelError = require("./../errors/InvalidModelError");

module.exports = function getBoundValue(model, pathArg, materialized) {

    var path = pathArg;
    var boundPath = pathArg;
    var boxed, treatErrorsAsValues,
        value, shorted, found;

    boxed = model._boxed;
    materialized = model._materialized;
    treatErrorsAsValues = model._treatErrorsAsValues;

    model._boxed = true;
    model._materialized = materialized === undefined || materialized;
    model._treatErrorsAsValues = true;

    value = getValueSync(model, path.concat(null), true);

    model._boxed = boxed;
    model._materialized = materialized;
    model._treatErrorsAsValues = treatErrorsAsValues;

    path = value.optimizedPath;
    shorted = value.shorted;
    found = value.found;
    value = value.value;

    while (path.length && path[path.length - 1] === null) {
        path.pop();
    }

    if (found && shorted) {
        throw new InvalidModelError(boundPath, path);
    }

    return {
        path: path,
        value: value,
        shorted: shorted,
        found: found
    };
};