Hi guys,
I am using django to develop a calendar web app where users can create events
that are then displayed on a month by month view.
I have written a custom template tag that takes Python's HTMLCalendar
formatmonth function and overlays events that are on that day.
It is currently set up to take the start date of the event directly from each
event and then use groupby to group each event by the day of the month in a
dictionary. These can then be overlaid on the calendar. This, however, is not
particularly useful if an event occurs over multiple days.
I want to find a way of taking each of the days the event occurs over, start
date to end date, before returning a similar dictionary. However, I cannot seem
to get this to work whichever way I try it. Here is the group_by_day function
that currently groups the events by start date:
#Here is where the code groups events for the relevant month day
def group_by_day(self, events):
field = lambda event: event.start_date.day
return dict(
[(day, list(items)) for day, items in groupby(events, field)]
)
Can anyone suggest a way round this problem?
If you need any more information please let me know. The project can be viewed
in entirety at https://github.com/Willrholmes01/organiser.
Below is the entire template tag:
register = template.Library()
def do_month_calendarify(parser, token):
# Take the tag input from the template and format
# Template syntax is {% calendarify year month %}
try:
tag_name, year, month, event_list = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError(
"%r tag requires three arguments" % token.contents.split()[0]
)
return CalendarifyNode(year, month, event_list)
class CalendarifyNode(template.Node):
def __init__(self, year, month, event_list):
try:
self.year = template.Variable(year)
self.month = template.Variable(month)
self.event_list = template.Variable(event_list)
except ValueError:
raise template.TemplateSyntaxError
def render(self, context):
try:
my_year = self.year.resolve(context)
my_month = self.month.resolve(context)
my_event_list = self.event_list.resolve(context)
cal = EventCalendar(my_event_list)
return cal.formatmonth(
int(my_year), int(my_month))
except ValueError:
return "%s, %s, %s" % (my_month, my_year, my_event_list)
class EventCalendar(HTMLCalendar):
# Use Python's HTMLCalendar and put user events over top
def __init__(self, events):
super(EventCalendar, self).__init__()
self.events = self.group_by_day(events)
def formatday(self, day, weekday):
if day != 0:
cssid = self.cssclasses[weekday]
cssclass = "daybox"
if date.today() == date(self.year, self.month, day):
cssid += ' today'
if day in self.events:
cssid += ' filled'
body = ['<ul>']
for event in self.events[day]:
body.append('<li>')
body.append('<a id="event_%d" href="%s">'
% (event.id, event.get_absolute_url()))
body.append(esc(event.title))
body.append('</a></li>')
body.append('</ul>')
return self.day_cell(
cssclass, cssid, '<span class="dayNumber">%d</span> %s'
% (
day, ''.join(body)))
return self.day_cell(
cssclass, cssid, '<span
class="dayNumberNoReadings">%d</span>' % (day))
return self.day_cell('nodaybox', 'noday', ' ')
def formatmonth(self, year, month):
self.year, self.month = year, month
return super(EventCalendar, self).formatmonth(year, month)
#Here is where the code groups events for the relevant month day
def group_by_day(self, events):
field = lambda event: event.start_date.day
return dict(
[(day, list(items)) for day, items in groupby(events, field)]
)
def day_cell(self, cssclass, cssid, body):
return '<td class="%s" id="%s">%s</td>' % (cssclass, cssid, body)
register.tag('calendarify', do_month_calendarify)
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