coral/lib/queryConfig.js

Node JS framework to dynamically create REST application with express and mongoose Models

var _ = require('underscore');
//export QueryConfig
module.exports = QueryConfig;


var callback = function(req, res, updateRef) {

	var updateDocReference = function (data) {
		var findOneId = updateRef.findOneId;

		if(_.isFunction(updateRef.findOneId)) {
			findOneId = updateRef.findOneId(req, res);
		}

		updateRef.model.findOne({_id: findOneId}, function (err, doc) {
			if (err) {
				return res.status(400).json(err);
			}

			if(_.isArray(doc[updateRef.path])) {
				doc[updateRef.path].push(data._id);
			} else {
				doc[updateRef.path] = data._id;
			}

			doc.save(function(saveErr) {
				if (saveErr) {
					return res.status(400).json(saveErr);
				}

				return res.json(data);
			});

		});
	};


	return function(err, data) {
		if (err) {
			return res.status(400).json(err);
		}

		if(data && updateRef && req.method === 'POST') {
			updateDocReference(data);
		} else {
			return res.json(data);
		}

	};
};

//returns the process object with the passed data for pagination and sorting
function QueryConfig(req, res, config) {

	var sort = req.query.sort,
		order = req.query.order,
		select = req.query.select,
		skip = req.query.skip,
		limit = req.query.limit,
		page = req.query.page,
		perPage = config.perPage || 10,
		idAttribute = config.idParam ? req.params[config.idParam] : req.params.idAttribute,
		query = config.query || {},
		updateRef = config.updateRef,
		conditions = query.conditions || {},
		options = query.options || {},
		fields = query.fields || '',
		subDoc = config.subDoc,
		data = req.body;

	//sort order
	if (sort && (order === 'desc' || order === 'descending' || order === '-1')) {
		options.sort = '-' + sort;
	}

	if (sort && (order === 'asc' || order === 'ascending' || order === '1')) {
		options.sort = sort;
	}

	if (skip) {
		options.skip = skip;
	}

	if (limit) {
		options.limit = limit;
	}

	//pagination
	if (page) {
		options.skip = page * perPage;
		options.limit = perPage;
	}

	//to find unique record for update, remove and findOne
	if (idAttribute) {
		conditions[config.idAttribute || '_id'] = idAttribute;
	}

	while (subDoc) {
		idAttribute = subDoc.idParam ? req.params[subDoc.idParam] : req.params.idAttribute;
		if (idAttribute) {
			subDoc.conditions = {};
			subDoc.conditions[subDoc.idAttribute] = idAttribute;
		}
		subDoc = subDoc.subDoc;
	}

	if (select) {
		fields = select.replace(/,/g, ' ');
	}

	return {
		conditions: conditions,
		subDoc: config.subDoc,
		fields: fields,
		options: options,
		data: data,
		callback: callback(req, res, updateRef)
	};

}