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from functools import wraps
from flask import request, render_template
from wtforms import Field, ValidationError
from widgets import Static
# using http://flask.pocoo.org/docs/patterns/viewdecorators/
def templated(template=None):
def decorator(f):
@wraps(f)
def decorated_function(*args, **kwargs):
template_name = template
if template_name is None:
template_name = request.endpoint \
.replace('.', '/') + '.html'
ctx = f(*args, **kwargs)
if ctx is None:
ctx = {}
elif not isinstance(ctx, dict):
return ctx
return render_template(template_name, **ctx)
return decorated_function
return decorator
class Unique(object):
""" validator that checks field uniqueness """
def __init__(self, model, field, message=None):
self.model = model
self.field = field
if not message:
message = u'This element already exists.'
self.message = message
def __call__(self, form, field):
try:
self.model.get(self.field == field.data)
raise ValidationError(self.message)
except self.model.DoesNotExist:
pass
class ReadonlyField(Field):
widget = Static()
def process_formdata(self, _):
pass
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