96 lines
3.5 KiB
JavaScript
96 lines
3.5 KiB
JavaScript
|
dojo.provide("dojox.data.util.JsonQuery");
|
||
|
|
// this is a mixin to convert object attribute queries to
|
||
|
|
// JSONQuery/JSONPath syntax to be sent to the server.
|
||
|
|
dojo.declare("dojox.data.util.JsonQuery", null, {
|
||
|
|
useFullIdInQueries: false,
|
||
|
|
_toJsonQuery: function(args, jsonQueryPagination){
|
||
|
|
var first = true;
|
||
|
|
var self = this;
|
||
|
|
function buildQuery(path, query){
|
||
|
|
if(query.__id){
|
||
|
|
// it is a reference to a persisted object, need to make it a query by id
|
||
|
|
var newQuery = {};
|
||
|
|
newQuery[self.idAttribute] = self.useFullIdInQueries ? query.__id : query[self.idAttribute];
|
||
|
|
query = newQuery;
|
||
|
|
}
|
||
|
|
for(var i in query){
|
||
|
|
// iterate through each property, adding them to the overall query
|
||
|
|
var value = query[i];
|
||
|
|
var newPath = path + (/^[a-zA-Z_][\w_]*$/.test(i) ? '.' + i : '[' + dojo._escapeString(i) + ']');
|
||
|
|
if(value && typeof value == "object"){
|
||
|
|
buildQuery(newPath, value);
|
||
|
|
}else if(value!="*"){ // full wildcards can be ommitted
|
||
|
|
jsonQuery += (first ? "" : "&") + newPath +
|
||
|
|
((args.queryOptions && args.queryOptions.ignoreCase) ? "~" : "=") +
|
||
|
|
dojo.toJson(value);
|
||
|
|
first = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// performs conversion of Dojo Data query objects and sort arrays to JSONQuery strings
|
||
|
|
if(args.query && typeof args.query == "object"){
|
||
|
|
// convert Dojo Data query objects to JSONQuery
|
||
|
|
var jsonQuery = "[?(";
|
||
|
|
buildQuery("@", args.query);
|
||
|
|
if(!first){
|
||
|
|
// use ' instead of " for quoting in JSONQuery, and end with ]
|
||
|
|
jsonQuery += ")]";
|
||
|
|
}else{
|
||
|
|
jsonQuery = "";
|
||
|
|
}
|
||
|
|
args.queryStr = jsonQuery.replace(/\\"|"/g,function(t){return t == '"' ? "'" : t;});
|
||
|
|
}else if(!args.query || args.query == '*'){
|
||
|
|
args.query = "";
|
||
|
|
}
|
||
|
|
|
||
|
|
var sort = args.sort;
|
||
|
|
if(sort){
|
||
|
|
// if we have a sort order, add that to the JSONQuery expression
|
||
|
|
args.queryStr = args.queryStr || (typeof args.query == 'string' ? args.query : "");
|
||
|
|
first = true;
|
||
|
|
for(i = 0; i < sort.length; i++){
|
||
|
|
args.queryStr += (first ? '[' : ',') + (sort[i].descending ? '\\' : '/') + "@[" + dojo._escapeString(sort[i].attribute) + "]";
|
||
|
|
first = false;
|
||
|
|
}
|
||
|
|
if(!first){
|
||
|
|
args.queryStr += ']';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// this is optional because with client side paging JSONQuery doesn't yield the total count
|
||
|
|
if(jsonQueryPagination && (args.start || args.count)){
|
||
|
|
// pagination
|
||
|
|
args.queryStr = (args.queryStr || (typeof args.query == 'string' ? args.query : "")) +
|
||
|
|
'[' + (args.start || '') + ':' + (args.count ? (args.start || 0) + args.count : '') + ']';
|
||
|
|
}
|
||
|
|
if(typeof args.queryStr == 'string'){
|
||
|
|
args.queryStr = args.queryStr.replace(/\\"|"/g,function(t){return t == '"' ? "'" : t;});
|
||
|
|
return args.queryStr;
|
||
|
|
}
|
||
|
|
return args.query;
|
||
|
|
},
|
||
|
|
jsonQueryPagination: true,
|
||
|
|
fetch: function(args){
|
||
|
|
this._toJsonQuery(args, this.jsonQueryPagination);
|
||
|
|
return this.inherited(arguments);
|
||
|
|
},
|
||
|
|
isUpdateable: function(){
|
||
|
|
return true;
|
||
|
|
},
|
||
|
|
matchesQuery: function(item,request){
|
||
|
|
request._jsonQuery = request._jsonQuery || dojox.json.query(this._toJsonQuery(request));
|
||
|
|
return request._jsonQuery([item]).length;
|
||
|
|
},
|
||
|
|
clientSideFetch: function(/*Object*/ request,/*Array*/ baseResults){
|
||
|
|
request._jsonQuery = request._jsonQuery || dojox.json.query(this._toJsonQuery(request));
|
||
|
|
// we use client side paging function here instead of JSON Query because we must also determine the total count
|
||
|
|
return this.clientSidePaging(request, request._jsonQuery(baseResults));
|
||
|
|
},
|
||
|
|
querySuperSet: function(argsSuper,argsSub){
|
||
|
|
if(!argsSuper.query){
|
||
|
|
return argsSub.query;
|
||
|
|
}
|
||
|
|
return this.inherited(arguments);
|
||
|
|
}
|
||
|
|
|
||
|
|
});
|