Add a header with total of selected columns

Datatable/AbstractDatatable.php

@@ -14,6 +14,7 @@
 use Doctrine\ORM\EntityManagerInterface;
 use Exception;
 use Sg\DatatablesBundle\Datatable\Column\ColumnBuilder;
+use Sg\DatatablesBundle\Response\DatatableQueryBuilder;
 use Symfony\Component\PropertyAccess\PropertyAccess;
 use Symfony\Component\PropertyAccess\PropertyAccessor;
 use Symfony\Component\Routing\RouterInterface;
@@ -301,6 +302,35 @@ public function getUniqueName()
         return $this->getName().($this->getUniqueId() > 1 ? '-'.$this->getUniqueId() : '');
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getDisplayTotals()
+    {
+        foreach ($this->getColumnBuilder()->getColumns() as $column) {
+            if ($column->getComputeTotal()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function computeTotals()
+    {
+        if ($this->getDisplayTotals()) {
+            $datatableQueryBuilder = new DatatableQueryBuilder(array(), $this);
+            $totals = $datatableQueryBuilder->getComputedTotals();
+
+            foreach ($totals as $key => $value) {
+                $this->getColumnBuilder()->setColumnTotal($key, $value);
+            }
+        }
+    }
+
     //-------------------------------------------------
     // Private
     //-------------------------------------------------

Datatable/Column/AbstractColumn.php

@@ -365,7 +365,6 @@ public function configureOptions(OptionsResolver $resolver)
             'data_source' => null,
         ]);
 
-        $resolver->setAllowedTypes('cell_type', ['null', 'string']);
         $resolver->setAllowedTypes('class_name', ['null', 'string']);
         $resolver->setAllowedTypes('content_padding', ['null', 'string']);
         $resolver->setAllowedTypes('dql', ['null', 'string']);
@@ -380,15 +379,12 @@ public function configureOptions(OptionsResolver $resolver)
         $resolver->setAllowedTypes('visible', 'bool');
         $resolver->setAllowedTypes('width', ['null', 'string']);
         $resolver->setAllowedTypes('add_if', ['null', 'Closure']);
-        $resolver->setAllowedTypes('join_type', 'string');
-        $resolver->setAllowedTypes('type_of_field', ['null', 'string']);
         $resolver->setAllowedTypes('responsive_priority', ['null', 'int']);
         $resolver->setAllowedTypes('sent_in_response', ['bool']);
         $resolver->setAllowedTypes('compute_total', ['bool']);
         $resolver->setAllowedTypes('mapped', ['bool']);
         $resolver->setAllowedTypes('is_association', ['bool']);
         $resolver->setAllowedTypes('data_source', ['string', 'null']);
-
         $resolver->setAllowedValues('cell_type', [null, 'th', 'td']);
         $resolver->setAllowedValues('join_type', [null, 'join', 'leftJoin', 'innerJoin']);
         $resolver->setAllowedValues('type_of_field', array_merge([null], array_keys(DoctrineType::getTypesMap())));
@@ -1107,7 +1103,7 @@ public function getTotal()
     /**
      * Set total.
      *
-     * @param $total
+     * @param mixed $total
      *
      * @return $this
      */

Datatable/Column/ColumnBuilder.php

@@ -185,6 +185,16 @@ public function getUniqueColumn($columnType)
         return \array_key_exists($columnType, $this->uniqueColumns) ? $this->uniqueColumns[$columnType] : null;
     }
 
+    public function setColumnTotal($dql, $total)
+    {
+        foreach ($this->columns as $column) {
+            if ($column->getDql() == $dql) {
+                $column->setTotal($total);
+                break;
+            }
+        }
+    }
+
     //-------------------------------------------------
     // Helper
     //-------------------------------------------------

Datatable/DatatableInterface.php

@@ -132,4 +132,18 @@ public function getUniqueId();
      * @return string
      */
     public function getUniqueName();
+
+    /**
+     * Returns if a total line in the header should appear
+     *
+     * @return bool
+     */
+    public function getDisplayTotals();
+
+    /**
+     * Compute totals before rendering the datatable HTML code
+     *
+     * @return void
+     */
+    public function computeTotals();
 }

Resources/doc/columns.md

@@ -54,6 +54,7 @@ With 'null' initialized options uses the default value of the DataTables plugin.
 | mapped              | bool               | true              |          | Allow to create columns not mapped in entity neither defined by DQL. |
 | is_association      | bool               | false             |          | Allow to force if the column is an association, usally used with `mapped` and `data_source`. |
 | data_source         | null or string     | null              |          | Specify the column source of the data to manipulate in the current column. Usally used with `mapped` and `data_source`. | 
+| compute_total       | bool               | false             |          | Compute the total of numbers of all the row selected by the query. Totals will be displayed on a header row. |
 
 ### Example
 
@@ -761,6 +762,7 @@ public function buildDatatable(array $options = array())
 }
 ```
 
+
 ## 10. Link column
 
 Represents a column, with a link in each cell.

Resources/views/datatable/datatable_html.html.twig

@@ -45,6 +45,19 @@
                 {% endif %}
             {% endfor %}
         </tr>
+        {% if sg_datatables_view.displayTotals %}
+            <tr>
+                {% for column in sg_datatables_view.columnBuilder.columns %}
+                    {% if column.sentInResponse %}
+                        <th>
+                            {% if column.computeTotal %}
+                                TOTAL: {{ column.total }}
+                            {% endif %}
+                        </th>
+                    {% endif %}
+                {% endfor %}
+            </tr>
+        {% endif %}
     </thead>
         {% if true == individual_filtering %}
             {% if 'foot' == sg_datatables_view.options.individualFilteringPosition or 'both' == sg_datatables_view.options.individualFilteringPosition%}

Response/DatatableQueryBuilder.php

@@ -598,6 +598,29 @@ private function setLimit(QueryBuilder $qb)
         return $this;
     }
 
+    public function getComputedTotals()
+    {
+        $qb = clone $this->qb;
+
+        $queryString = "";
+
+        foreach ($this->columns as $column) {
+            if ($column->getComputeTotal()) {
+                $queryString .= 'SUM(' . $this->entityShortName . '.' . $column->getDql() . ') AS ' . $column->getDql() . ' ';
+            }
+        }
+
+        $qb->select($queryString);
+        $qb->resetDQLPart('orderBy');
+        $this->setJoins($qb);
+
+        $query = $qb->getQuery();
+        $query->useQueryCache($this->useCountQueryCache);
+        call_user_func_array([$query, 'useResultCache'], $this->useCountResultCacheArgs);
+
+        return $query->getOneOrNullResult();
+    }
+
     //-------------------------------------------------
     // Private - Helper
     //-------------------------------------------------

Twig/DatatableTwigExtension.php

@@ -104,6 +104,8 @@ public function getFilters()
      */
     public function datatablesRender(Twig_Environment $twig, DatatableInterface $datatable)
     {
+        $datatable->computeTotals();
+
         return $twig->render(
             '@SgDatatables/datatable/datatable.html.twig',
             [
@@ -119,6 +121,8 @@ public function datatablesRender(Twig_Environment $twig, DatatableInterface $dat
      */
     public function datatablesRenderHtml(Twig_Environment $twig, DatatableInterface $datatable)
     {
+        $datatable->computeTotals();
+
         return $twig->render(
             '@SgDatatables/datatable/datatable_html.html.twig',
             [