- changed data result from null to an empty array when flags are many…

… + none.

- docs update.

README.md

@@ -100,9 +100,9 @@ db.manyOrNone("select * from users")
 Each query function resolves <b>data</b> according to the <b>Query Result Mask</b> that was used, and must be handled accordingly, as explained below.
 * `none` - <b>data</b> is `null`. If the query returns any kind of data, it is rejected.
 * `one` - <b>data</b> is a single object. If the query returns no data or more than one row of data, it is rejected.
-* `many` - <b>data</b> is an array of objects. If the query returns no data, it is rejected.
+* `many` - <b>data</b> is an array of objects. If the query returns no rows, it is rejected.
 * `one` | `none` - <b>data</b> is `null`, if no data was returned; or a single object, if there was one row of data returned. If the query returns more than one row of data, the query is rejected.
-* `many` | `none` - <b>data</b> is `null`, if no data was returned. If there were one or more rows returned, data is an array of objects.
+* `many` | `none` - <b>data</b> is an array of objects. When no rows returned, `data` is an empty array.
 
 If you try to specify `one` | `many` in the same query, such query will be rejected without executing it, telling you that such mask is not valid.
 

index.js

@@ -35,7 +35,7 @@ queryResult = {
 module.exports = function (options) {
 
     var lib = function (cn) {
-        if(!$isEmptyObject(this)){
+        if (!$isEmptyObject(this)) {
             // This makes it easy to locate the most common mistake -
             // skipping keyword 'new' when calling: var db = new pgp(cn);
             throw new Error("Invalid database object instantiation.");
@@ -191,7 +191,7 @@ function dbInit(dbInst, cn, options) {
 
         var tx = this;
 
-        if(!$isEmptyObject(tx)){
+        if (!$isEmptyObject(tx)) {
             // This makes it easy to locate the most common mistake -
             // skipping keyword 'new' when calling: var tx = new db.tx(cn);
             throw new Error("Invalid transaction object instantiation.");
@@ -321,7 +321,7 @@ function $isNull(val) {
 }
 
 // Checks if the object is empty (has no properties);
-function $isEmptyObject(obj){
+function $isEmptyObject(obj) {
     return Object.keys(obj).length === 0;
 }
 
@@ -398,7 +398,7 @@ function $query(client, query, qrm) {
                         }
                     } else {
                         if (qrm & queryResult.none) {
-                            data = null;
+                            data = (qrm & queryResult.many) ? [] : null;
                         } else {
                             reject("No rows returned from query: '" + query + "'");
                         }