Add caseInsensitive opt to validatesUniquenessOf

lib/validations.js

@@ -240,6 +240,7 @@ Validatable.validateAsync = getConfigurator('custom', {async: true});
  * @property {Array.<String>} scopedTo List of properties defining the scope.
  * @property {String} message Optional error message if property is not valid.  Default error message: "is not unique".
  * @property {Boolean} allowNull Whether null values are allowed.
+ * @property {String} ignoreCase Make the validation case insensitive
  */
 Validatable.validatesUniquenessOf = getConfigurator('uniqueness', {async: true});
 
@@ -344,6 +345,14 @@ function validateCustom(attr, conf, err, options, done) {
   conf.customValidator.call(this, err, done);
 }
 
+function escapeStringRegexp(str) {
+  if (typeof str !== 'string') {
+    throw new TypeError('Expected a string');
+  }
+  var matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
+  return str.replace(matchOperatorsRe, '\\$&');
+}
+
 /*!
  * Uniqueness validator
  */
@@ -356,7 +365,12 @@ function validateUniqueness(attr, conf, err, options, done) {
     return process.nextTick(done);
   }
   var cond = {where: {}};
-  cond.where[attr] = this[attr];
+
+  if (conf && conf.ignoreCase) {
+    cond.where[attr] = new RegExp('^' + escapeStringRegexp(this[attr]) + '$', 'i');
+  } else {
+    cond.where[attr] = this[attr];
+  }
 
   if (conf && conf.scopedTo) {
     conf.scopedTo.forEach(function(k) {

test/validations.test.js

@@ -517,6 +517,102 @@ describe('validations', function() {
         })).should.be.false;
       });
     });
+
+    it('passes case insensitive validation', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: true});
+      var u = new User({email: 'hey'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'HEY'});
+          u2.isValid(function(valid) {
+            valid.should.be.false();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
+
+    it('passed case sensitive validation', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: false});
+      var u = new User({email: 'hey'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'HEY'});
+          u2.isValid(function(valid) {
+            valid.should.be.true();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
+
+    it('passes case insensitive validation with string that needs escaping', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: true});
+      var u = new User({email: 'me+me@my.com'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'ME+ME@MY.COM'});
+          u2.isValid(function(valid) {
+            valid.should.be.false();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
+
+    it('passed case sensitive validation with string that needs escaping', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: false});
+      var u = new User({email: 'me+me@my.com'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'ME+ME@MY.COM'});
+          u2.isValid(function(valid) {
+            valid.should.be.true();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
+
+    it('passes partial case insensitive validation with string that needs escaping', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: true});
+      var u = new User({email: 'also+me@my.com'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'Me@My.com'});
+          u2.isValid(function(valid) {
+            valid.should.be.true();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
+
+    it('passes partial case sensitive validation with string that needs escaping', function(done) {
+      User.validatesUniquenessOf('email', {ignoreCase: false});
+      var u = new User({email: 'also+me@my.com'});
+      Boolean(u.isValid(function(valid) {
+        valid.should.be.true();
+        u.save(function(err) {
+          if (err) return done(err);
+          var u2 = new User({email: 'Me@My.com'});
+          u2.isValid(function(valid) {
+            valid.should.be.true();
+            done();
+          });
+        });
+      })).should.be.false();
+    });
   });
 
   describe('format', function() {