From e34e288bc5713a5a34958be8e678d2b23f4c7adb Mon Sep 17 00:00:00 2001
From: René 'Necoro' Neumann <necoro@necoro.net>
Date: Tue, 15 Oct 2013 23:23:19 +0200
Subject: Flash on error in all forms

---
 app/forms.py       | 22 ++++++++++++++++++++--
 app/views/login.py |  4 +---
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/app/forms.py b/app/forms.py
index 3bba70e..664b709 100644
--- a/app/forms.py
+++ b/app/forms.py
@@ -1,6 +1,6 @@
 # -*- encoding: utf-8 -*-
-
-from flask.ext.wtf import Form
+import flask
+from flask.ext.wtf import Form as _Form
 from wtforms.fields import DateField, IntegerField, StringField, HiddenField, PasswordField
 from wtforms import validators as v
 from wtforms import fields
@@ -26,6 +26,24 @@ class DecimalField(fields.DecimalField):
 
 req = [v.input_required()]
 
+class Form(_Form):
+    def __init__ (self, *args, **kwargs):
+        self._msg = kwargs.pop("flash", u"Fehler im Formular!")
+        _Form.__init__(self, *args, **kwargs)
+
+    def flash(self):
+        flask.flash(self._msg, u"error")
+
+    def flash_validate (self):
+        if not self.validate():
+            self.flash()
+            return False
+
+        return True
+
+    def validate_on_submit (self):
+        return self.is_submitted() and self.flash_validate()
+
 class ExpenseForm(Form):
     date = DateField(u"Datum", req,
             format="%d.%m.%Y",
diff --git a/app/views/login.py b/app/views/login.py
index 413d406..8815626 100644
--- a/app/views/login.py
+++ b/app/views/login.py
@@ -13,13 +13,11 @@ mod = Blueprint('login', __name__)
 @mod.route("/login", methods=("GET", "POST"))
 @templated()
 def login():
-   form = LoginForm()
+   form = LoginForm(flash=u"Login fehlgeschlagen!")
 
    if form.validate_on_submit():
        login_user(form.user)
        return redirect(request.args.get("next") or url_for("index"))
-   elif form.is_submitted():
-       flash("Login fehlgeschlagen!", "error")
 
    return { 'form': form }
 
-- 
cgit v1.2.3-54-g00ecf