Resolve "Prevent duplacated name of election"

internal/models/election.go

@@ -74,6 +74,16 @@ func (d *DataHandler) postElection(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
+
+	var elections []Election
+	d.db.Find(&elections)
+	for _, val := range elections {
+		if o.Name == val.Name {
+			http.Error(w, "Name Already exist.", 409)
+			return
+		}
+	}
+
 	d.db.Create(&o)
 	d.db.Last(&o)
 	json.NewEncoder(w).Encode(o)

web/components/management/election.js

@@ -256,6 +256,12 @@ class Election {
           }),
         }
       );
+      if (response.status == 409) {
+        throw new Error(
+          `The name of the election already exist (status ${response.status})`
+
+        );
+      }
       if (response.status !== 200) {
         throw new Error(
           `Election could not be updated or created (status ${response.status})`
@@ -266,6 +272,7 @@ class Election {
     } catch (e) {
       Messages.Show("is-warning", e.message);
       console.error(e);
+      return
     }
     Common.toggleModal("election-modal", "election-modal-card");
     this.activateElection(election);