create sql request in purchase module to get orders between 2 dates

lacagette_addons/lacagette_purchase/__openerp__.py

@@ -6,7 +6,7 @@
         Customization of Purchase process""",
 
     'description': """
-        Customization of Purchase process
+        Customization of Purchase process & orders export method
     """,
 
     'author': "cooperatic",

lacagette_addons/lacagette_purchase/models/purchase_order.py

@@ -40,3 +40,27 @@ class PurchaseOrder(models.Model):
             export_url += '/export/' + str(self.id)
             requests.get(export_url)
         return res
+
+    @api.multi
+    def get_received_orders_between_dates(self, date_from, date_to):
+        res = {}
+        sql = """
+            SELECT po.name as id_po, sp.date_done, po.amount_untaxed, po.amount_total, po.state, rp.name as supplier_name
+            FROM purchase_order as po
+            LEFT JOIN stock_picking as sp ON po.name=sp.origin
+            LEFT JOIN res_partner as rp ON po.partner_id=rp.id
+            WHERE sp.date_done IS NOT NULL
+            AND sp.date_done > '{date_from}'
+            AND sp.date_done < '{date_to}'
+            ORDER BY sp.date_done ASC
+        """
+
+        sql = sql.format(date_from=date_from, date_to=date_to)
+
+        try:
+            self.env.cr.execute(sql)
+            res["data"] = self.env.cr.dictfetchall()
+        except Exception as e:
+            res["error"] = str(e)
+
+        return res