diff --git a/lib/dao.js b/lib/dao.js
index 279b05ae..0ea878a7 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -383,23 +383,52 @@ DataAccessObject._coerce = function (where) {
                 return new OrigDate(arg);
             };
         } else if (DataType === Boolean) {
-          DataType = function(val) {
-            if(val === 'true') {
-              return true;
-            } else if(val === 'false') {
-              return false;
-            } else {
-              return Boolean(val);
-            }
-          };
+            DataType = function(val) {
+                if(val === 'true') {
+                    return true;
+                } else if(val === 'false') {
+                  return false;
+                } else {
+                  return Boolean(val);
+                }
+            };
+        } else if(DataType === Number) {
+            // This fixes a regression in mongodb connector
+            // For numbers, only convert it produces a valid number
+            // LoopBack by default injects a number id. We should fix it based
+            // on the connector's input, for example, MongoDB should use string
+            // while RDBs typically use number
+            DataType = function(val) {
+                var num = Number(val);
+                return !isNaN(num) ? num : val;
+            };
         }
+
         if (!DataType) {
-          continue;
+            continue;
         }
+
+        if (DataType === geo.GeoPoint) {
+            // Skip the GeoPoint as the near operator breaks the assumption that
+            // an operation has only one property
+            // We should probably fix it based on
+            // http://docs.mongodb.org/manual/reference/operator/query/near/
+            // The other option is to make operators start with $
+            continue;
+        }
+
         var val = where[p];
+        if(val === null || val === undefined) {
+            continue;
+        }
         // Check there is an operator
         var operator = null;
-        if ('object' === typeof val && Object.keys(val).length === 1) {
+        if ('object' === typeof val) {
+            if (Object.keys(val).length !== 1) {
+                // Skip if there are not only one properties
+                // as the assumption for operators is not true here
+                continue;
+            }
             for (var op in operators) {
                 if (op in val) {
                     val = val[op];
@@ -455,6 +484,11 @@ DataAccessObject.find = function find(params, cb) {
     var constr = this;
     
     params = params || {};
+
+    if(params.where) {
+        params.where = this._coerce(params.where);
+    }
+
     var fields = params.fields;
     var near = params && geo.nearFilter(params.where);
     var supportsGeo = !!this.getDataSource().connector.buildNearFilter;
@@ -465,9 +499,6 @@ DataAccessObject.find = function find(params, cb) {
     }
 
     params = removeUndefined(params);
-    if(params.where) {
-        params.where = this._coerce(params.where);
-    }
     if(near) {
       if(supportsGeo) {
         // convert it
diff --git a/lib/geo.js b/lib/geo.js
index 6a43e4af..580308a7 100644
--- a/lib/geo.js
+++ b/lib/geo.js
@@ -106,8 +106,8 @@ function GeoPoint(data) {
   }
   
   assert(typeof data === 'object', 'must provide a lat and lng object when creating a GeoPoint');
-  assert(typeof data.lat === 'number', 'lat must be a number when creating a GeoPoint');
-  assert(typeof data.lng === 'number', 'lng must be a number when creating a GeoPoint');
+  assert(typeof data.lat === 'number' && !isNaN(data.lat), 'lat must be a number when creating a GeoPoint');
+  assert(typeof data.lng === 'number' && !isNaN(data.lng), 'lng must be a number when creating a GeoPoint');
   assert(data.lng <= 180, 'lng must be <= 180');
   assert(data.lng >= -180, 'lng must be >= -180');
   assert(data.lat <= 90, 'lat must be <= 90');
diff --git a/test/loopback-dl.test.js b/test/loopback-dl.test.js
index f324b97d..bb3c6457 100644
--- a/test/loopback-dl.test.js
+++ b/test/loopback-dl.test.js
@@ -582,6 +582,7 @@ describe('DataAccessObject', function () {
       age: Number,
       vip: Boolean,
       date: Date,
+      location: 'GeoPoint',
       scores: [Number]
     });
   });
@@ -647,6 +648,34 @@ describe('DataAccessObject', function () {
     assert.deepEqual(where, {vip: false});
 
   });
+
+  it('should skip GeoPoint', function () {
+    where = model._coerce({location: {near: {lng: 10, lat: 20}, maxDistance: 20}});
+    assert.deepEqual(where, {location: {near: {lng: 10, lat: 20}, maxDistance: 20}});
+  });
+
+  it('should skip null values', function () {
+    where = model._coerce({date: null});
+    assert.deepEqual(where, {date: null});
+  });
+
+  it('should skip undefined values', function () {
+    where = model._coerce({date: undefined});
+    assert.deepEqual(where, {date: undefined});
+  });
+
+  it('should skip conversion if a simple property produces NaN for numbers',
+    function () {
+    where = model._coerce({age: 'xyz'});
+    assert.deepEqual(where, {age: 'xyz'});
+  });
+
+  it('should skip conversion if an array property produces NaN for numbers',
+    function () {
+    where = model._coerce({age: {inq: ['xyz', '12']}});
+    assert.deepEqual(where, {age: {inq: ['xyz', 12]}});
+  });
+
 });
 
 describe('Load models from json', function () {