Summary of the Day

Originally written on 2019-12-30. DEV's displayed publication date reflects this archive migration.

Django Learning Log rebuild project notes:

1. no reverse match error: normally there's a typo in your code, mainly on the url tag, or url pattern error in url.py file

2. import time: time.time() displays the time from 1970 in seconds

3. time in strings: 'Note - {}'.format(time.strftime('%b %d, %Y')), in month date, Year order, specifics check python doc > time.strftime()

4. Url dispatcher and regex: you can use regex with re_path('regex-in-here/', views.some_view_function), (?P\<name\>regex) is the same as <int: name> if it's integer. More to read on Django URL dispatcher

5. Mechanism of Django: models > urls > views > html > forms, and don't forget to add your new apps in settings, your models in admin.site.register(ModelName), include('new_app.urls')

6. forms.py: from Django import forms, from .models import ModelName, class FormName inherits(forms.ModelForm), sub-class class Meta: capitalised, examples:
   

   class TopicForm(forms.ModelForm):
       class Meta:
           model = Topic
           fields = ['text']
           labels = {'text': ''}
   
   class EntryForm(forms.ModelForm):
       class Meta:
           model = Entry
           fields = ['title', 'text']
           labels = {'title': 'Title', 'text': ''}
           widgets = {'text': forms.Textarea(attrs={'cols': 80})}
   

7. filter in templates:
   

       <!-- | is a template filter: a function modifies the value in a template variable -->
       <p>\{\{ entry.date_added | date:'M-d-y H:i' \}\}</p>
       <p>\{\{ entry.text | linebreaks \}\}</p>
   

8. Jekyll won't render markdown with liquid tag like this {\%\%}