Send error in /schools when trying to get all

src/libs/routes/school.js

@@ -62,6 +62,14 @@ rqf.addField({
 });
 
 schoolApp.get('/', rqf.parse(), rqf.build(), (req, res, next) => {
+    console.log(req.filter);
+    if(typeof req.filter === 'undefined' || Object.keys(req.filter).length === 0) {
+        res.status(400);
+        next({
+            status: 400,
+            message: 'Wrong/No filter specified'
+        });
+    }
     req.sql.from('escola')
         .field('escola.cod_entidade')
         .field('escola.ano_censo', 'year')
@@ -70,4 +78,4 @@ schoolApp.get('/', rqf.parse(), rqf.build(), (req, res, next) => {
     next();
 }, query, response('school'));
 
-module.exports = schoolApp;
+module.exports = schoolApp;
\ No newline at end of file