diff --git a/jinja2/qfdmo/dags_validations.html b/jinja2/qfdmo/dags_validations.html
index 6ff4c93eb..ec8eda4c5 100644
--- a/jinja2/qfdmo/dags_validations.html
+++ b/jinja2/qfdmo/dags_validations.html
@@ -8,12 +8,19 @@ <h1>Validations des «DAGs»</h1>
         <p>
             Cette page permet de valider les données des «DAGs».
         </p>
-
-        <form>
+        {% if messages %}
+        <ul class="messages">
+            {% for message in messages %}
+            <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
+            {% endfor %}
+        </ul>
+        {% endif %}
+        <form method='POST'>
             {{ csrf_input }}
             {{ form }}
+            {{ form.dagrun.value() }}
             <div class="fr-my-3w">
-                <button type="submit" class="fr-btn" method='GET'>Afficher le résumé du dag</button>
+                <button type="submit" class="fr-btn" method='POST' name='search' value=1>Afficher le résumé du dag</button>
             </div>
 
             {% if dagrun_instance %}
diff --git a/qfdmo/views/dags.py b/qfdmo/views/dags.py
index 34db7ea76..65a0bbedb 100644
--- a/qfdmo/views/dags.py
+++ b/qfdmo/views/dags.py
@@ -1,5 +1,6 @@
 import logging
 
+from django.contrib import messages
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.core.paginator import Paginator
 from django.shortcuts import render
@@ -21,12 +22,59 @@ class DagsValidation(IsStaffMixin, FormView):
     template_name = "qfdmo/dags_validations.html"
     success_url = "/dags/validations"
 
+    def form_valid(self, form):
+        # MANAGE search and display dagrun details
+        if self.request.POST.get("search"):
+            dagrun = form.cleaned_data["dagrun"]
+            context = {"form": form}
+            context["dagrun_instance"] = dagrun
+            dagrun_lines = dagrun.dagrunchanges.all().order_by("?")[:100]
+            context["dagrun_lines"] = dagrun_lines
+            return render(self.request, "qfdmo/dags_validations.html", context)
+
+        # ELSE: update the status of the dagrun and its dagrunlines
+        dagrun = form.cleaned_data["dagrun"]
+        new_status = (
+            DagRunStatus.TO_INSERT.value
+            if self.request.POST.get("dag_valid") == "1"
+            else DagRunStatus.REJECTED.value
+        )
+
+        # FIXME: I am not sure we need the filter here
+        dagrun.dagrunchanges.filter(status=DagRunStatus.TO_VALIDATE.value).update(
+            status=new_status
+        )
+        dagrun.status = new_status
+        dagrun.save()
+        messages.success(
+            self.request,
+            f"La cohorte {dagrun} a été mise à jour avec le statut {new_status}",
+        )
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        messages.error(self.request, "Il y a des erreurs dans le formulaire.")
+        return super().form_invalid(form)
+
+    # def form_valid(self, form):
+    #     if self.request.POST.get("search"):
+    #         messages.add_message(self.request, messages.INFO, "Form Valid.")
+    #         return super().form_valid(form)
+
+
+class DagsValidation1(IsStaffMixin, FormView):
+    form_class = DagsForm
+    template_name = "qfdmo/dags_validations.html"
+    success_url = "/dags/validations"
+
     def get_initial(self):
         initial = super().get_initial()
         initial["dagrun"] = self.request.GET.get("dagrun")
         return initial
 
     def post(self, request, *args, **kwargs):
+
         dag_valid = request.POST.get("dag_valid")
         if dag_valid in ["1", "0"]:
             return self.form_valid(self.get_form())