Merge pull request #4 from zishone/exists-operator

Add Exists operator.

Author: Fizcko

Readme.md

@@ -33,6 +33,7 @@ It's a query language that introduces basic and logical operators. This is perfe
 
 #### Additionals operators
 - Like : =~ (to match regex values)
+- Exists : =exists= (to check if property exists)
 
 ###### NOTE
 Parenthesized expression can be used to define the precedence.
@@ -79,6 +80,10 @@ try{
     rsqlMongoDB('lastName=~do*');
     //=> { "lastName": { $regex: "do*" } }
 
+    // Exists operator
+    rsqlMongoDB('childs=exists=true');
+    //=> { "childs": { $exists: true } }
+
     // Groups
     rsqlMongoDB('(firstName=="john";lastName=="doe"),(firstName==janne;lastName==doe)');
     //=> { $or: [ { $and: [ { "firstName" : "john" } , { "lastName" : "doe" } ] } , { $and: [ { "firstName" : "janne" } , { "lastName" : "doe" } ] } ] }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rsql-mongodb",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Converting RSQL queries to MongoDB queries",
   "main": "rsql-mongodb.js",
   "typings": "rsql-mongodb.ts",
@@ -17,6 +17,7 @@
     "test-cov-ci": "nyc npm test && nyc report --reporter=text-lcov | coveralls"
   },
   "author": "Fizcko",
+  "contributors": ["zishone (https://github.com/zishone)"],
   "license": "MIT",
   "repository": "https://github.com/Fizcko/rsql-mongodb",
   "bugs": {

rsql-mongodb.js

@@ -193,7 +193,7 @@ module.exports = function (input) {
 			}
 
 			// Split the query
-			var rsqlOperators = /(.*)(==|!=|=gt=|=ge=|=lt=|=le=|=in=|=out=|=~)(.*)/g;
+			var rsqlOperators = /(.*)(==|!=|=gt=|=ge=|=lt=|=le=|=in=|=out=|=~|=exists=)(.*)/g;
 			var rsqlQuery = rsqlOperators.exec(outputTab[i]);
 
 			try {
@@ -250,6 +250,9 @@ module.exports = function (input) {
 				case "=~":
 					mongoOperatorQuery[exp1] = { $regex: typedExp2 };
 					break;
+				case "=exists=":
+					mongoOperatorQuery[exp1] = { $exists: typedExp2 };
+					break;
 				default:
 					throw "Operator not supported."
 			}

test.js

@@ -55,6 +55,12 @@ describe('rsql-mongodb', function () {
     it("Test operator Like ('=~')", function () {
         expect(rsqlMongoDB('lastName=~do*')).to.deep.include({ "lastName": { $regex: "do*" } });
     });
+    it("Test operator Exists ('=exists=')", function () {
+        expect(rsqlMongoDB('childs=exists=true')).to.deep.include({ "childs": { $exists: true } });
+        expect(rsqlMongoDB('childs=exists=false')).to.deep.include({ "childs": { $exists: false } });
+        expect(rsqlMongoDB('childs=exists=true')).to.be.a('object');
+
+    });
     it("Test logical operator AND (';')", function () {
         expect(rsqlMongoDB('firstName=="john";lastName=="doe"')).to.deep.include({ $and: [ { "firstName" : "john" } , { "lastName" : "doe" } ] });
     });