Merge pull request #16 from SlicingDice/feature/update-count_total-method

Update countEntityTotal method and README example

Author: jadsonmonteiro

README.md

@@ -308,7 +308,7 @@ client.existsEntity(ids).then((resp) => {
 ```
 
 ### `countEntityTotal()`
-Count the number of inserted entities. This method corresponds to a [GET request at /query/count/entity/total](http://panel.slicingdice.com/docs/#api-details-api-endpoints-get-query-count-entity-total).
+Count the number of inserted entities in the whole database. This method corresponds to a [POST request at /query/count/entity/total](http://panel.slicingdice.com/docs/#api-details-api-endpoints-get-query-count-entity-total).
 
 #### Request example
 
@@ -339,6 +339,40 @@ client.countEntityTotal().then((resp) => {
 }
 ```
 
+### `countEntityTotal(tables)`
+Count the total number of inserted entities in the given tables. This method corresponds to a [POST request at /query/count/entity/total](http://panel.slicingdice.com/docs/#api-details-api-endpoints-get-query-count-entity-total).
+
+#### Request example
+
+```javascript
+let SlicingDice = require('slicerjs');
+
+const client = new SlicingDice({
+    masterKey: 'MASTER_KEY',
+    readKey: 'READ_KEY'
+}, usesTestEndpoint = true);
+
+const tables = ["default"];
+
+client.countEntityTotal(tables).then((resp) => {
+    console.log(resp);
+}, (err) => {
+    console.error(err);
+});
+```
+
+#### Output example
+
+```json
+{
+    "status": "success",
+    "result": {
+        "total": 42
+    },
+    "took": 0.103
+}
+```
+
 ### `countEntity(jsonData)`
 Count the number of entities matching the given query. This method corresponds to a [POST request at /query/count/entity](http://panel.slicingdice.com/docs/#api-details-api-endpoints-post-query-count-entity).
 

src/slicer.js

@@ -551,13 +551,20 @@
             let sdValidator = new QueryCountValidator(query);
             return this.countQueryWrapper(query, path);
         }
-
-        /* Makes a total query on Slicing Dice API */
-        countEntityTotal() {
+        
+        /* Makes a total query on Slicing Dice API 
+         *
+         * @param (array) tables - the tables in which the total query will be performed
+         */
+        countEntityTotal(tables = []) {
+            let query = {
+                "tables": tables
+            };
             let path  = this._sdRoutes.countEntityTotal;
             return this.makeRequest({
                 path: path,
-                reqType: "GET",
+                reqType: "POST",
+                data: query,
                 levelKey: 0
             })
         }