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//>>built
define("dojox/data/RailsStore", ["dojo", "dojox", "dojox/data/JsonRestStore"], function(dojo, dojox) {
// Contains code donated by Travis Tilley under CLA
dojo.declare("dojox.data.RailsStore", dojox.data.JsonRestStore, {
constructor: function(){
// summary:
// RailsStore is a data store for interacting with RESTful Rails controllers
},
preamble: function(options){
if(typeof options.target == 'string' && !options.service){
var target = options.target.replace(/\/$/g, '');
// Special getRequest handler for handling content type negotiation via
// the Rails format extension, as well as properly setting the ID param
// in the URL.
var getRequest = function(id, args){
args = args || {};
var url = target;
var query;
var ident;
if(dojo.isObject(id)){
ident = '';
query = '?' + dojo.objectToQuery(id);
}else if(args.queryStr && args.queryStr.indexOf('?') != -1){
ident = args.queryStr.replace(/\?.*/, '');
query = args.queryStr.replace(/[^?]*\?/g, '?');
}else if(dojo.isString(args.query) && args.query.indexOf('?') != -1){
ident = args.query.replace(/\?.*/, '');
query = args.query.replace(/[^?]*\?/g, '?');
}else{
ident = id ? id.toString() : '';
query = '';
}
if(ident.indexOf('=') != -1){
query = ident;
ident = '';
}
if(ident){
url = url + '/' + ident + '.json' + query;
}else{
url = url + '.json' + query;
}
var isSync = dojox.rpc._sync;
dojox.rpc._sync = false;
return {
url : url,
handleAs : 'json',
contentType : 'application/json',
sync : isSync,
headers : {
Accept : 'application/json,application/javascript',
Range : args && (args.start >= 0 || args.count >= 0)
? "items="
+ (args.start || '0')
+ '-'
+ ((args.count && (args.count
+ (args.start || 0) - 1)) || '')
: undefined
}
};
};
options.service = dojox.rpc.Rest(this.target, true, null,
getRequest);
}
},
fetch: function(args){
args = args || {};
function addToQueryStr(obj){
function buildInitialQueryString(){
if(args.queryStr == null){
args.queryStr = '';
}
if(dojo.isObject(args.query)){
args.queryStr = '?' + dojo.objectToQuery(args.query);
}else if(dojo.isString(args.query)){
args.queryStr = args.query;
}
}
function separator(){
if(args.queryStr.indexOf('?') == -1){
return '?';
}else{
return '&';
}
}
if(args.queryStr == null){
buildInitialQueryString();
}
args.queryStr = args.queryStr + separator() + dojo.objectToQuery(obj);
}
if(args.start || args.count){
// in addition to the content range headers, also provide query parameters for use
// with the will_paginate plugin if so desired.
if((args.start || 0) % args.count){
throw new Error("The start parameter must be a multiple of the count parameter");
}
addToQueryStr({
page: ((args.start || 0) / args.count) + 1,
per_page: args.count
});
}
if(args.sort){
// make the sort into query parameters
var queryObj = {
sortBy : [],
sortDir : []
};
dojo.forEach(args.sort, function(item){
queryObj.sortBy.push(item.attribute);
queryObj.sortDir.push(!!item.descending ? 'DESC' : 'ASC');
});
addToQueryStr(queryObj);
delete args.sort;
}
return this.inherited(arguments);
},
_processResults: function(results, deferred){
var items;
/*
* depending on the ActiveRecord::Base.include_root_in_json setting,
* you might get back an array of attribute objects, or an array of
* objects with the attribute object nested under an attribute having
* the same name as the (remote and unguessable) model class.
*
* 'Example' without root_in_json: [{'id':1, 'text':'first'}]
* 'Example' with root_in_json: [{'example':{'id':1, 'text':'first'}}]
*/
if((typeof this.rootAttribute == 'undefined') && results[0]){
if(results[0][this.idAttribute]){
this.rootAttribute = false;
console.debug('RailsStore: without root_in_json');
}else{
for(var attribute in results[0]){
if(results[0][attribute][this.idAttribute]){
this.rootAttribute = attribute;
console.debug('RailsStore: with root_in_json, attribute: ' + attribute);
}
}
}
}
if(this.rootAttribute){
items = dojo.map(results, function(item){
return item[this.rootAttribute];
}, this);
}else{
items = results;
}
// index the results
var count = results.length;
// if we don't know the length, and it is partial result, we will guess that it is twice as big, that will work for most widgets
return {totalCount:deferred.fullLength || (deferred.request.count == count ? (deferred.request.start || 0) + count * 2 : count), items: items};
}
});
return dojox.data.RailsStore;
});
|
