... newArticle.save((err,newArticle)=>{ if(err){ req.flash('error','Sorry , an error has occured. Thamk you try again later') //when i use console.log(req.flash('error')) it shows normally in the terminal return res.redirect('/AddArticle') }else{ req.flash('success','Thank you , your article has been added') //when i use console.log(req.flash('success')) it shows normally in the terminal return res.redirect('/AddArticle') } }) }

esta es la función de ruta:

 router.post('/AddFormArticle',control.FormAddArticle)

esta es la función de control FormAddArticle que utilicé para mostrar el mensaje flash y la página:

 exports.FormAddArticle = (req,res)=>{ res.render('FormArticle',{title : "Ajouter un Article" , success : req.flash('success') , error : req.flash('error') })