expo/expoweb
1
0
Fork 0
mirror of https://expo.survex.com/repositories/expoweb/.git/ synced 2025-12-08 23:04:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

class diagram - online edit of handbook/troggle/trogforms.html

Browse Source
This commit is contained in:
Philip Sargent at home
2024-12-31 07:09:17 +00:00
committed by Expo on server
parent b6c44f4aca
commit cbdf3c7052
1 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
handbook/troggle/trogforms.html
View File

@@ -42,11 +42,17 @@ But if you haven't worked with HTML forms before, then you actually have <a href
<h3>ModelForms</h3> <h3>ModelForms</h3>
<p>A few of our data entry pages use <a href="https://docs.djangoproject.com/en/5.1/topics/forms/modelforms/">ModelForms</a>, these are where the Form object is automagically created from a Model class. If you can't find where something is initialised, it is probably because it was done automatically and invisibly by instantiating a ModelForm. <p>A few of our data entry pages use <a href="https://docs.djangoproject.com/en/5.1/topics/forms/modelforms/">ModelForms</a>, these are where the Form object is automagically created from a Model class. If you can't find where something is initialised, it is probably because it was done automatically and invisibly by instantiating a ModelForm.
<h3 id="forloop">For loop</h3> _ <h3 id="forloop">For loop</h3>
<figure class="onright">
<a href="../l/trogclass-1.html"><img src="../t/trogclass-2.jpg" ></a>
<br><figcaption>Class Diagram<br />(Click to enlarge)</figcaption>
</figure>_
[This section to be moved to a generic Django Templating page] [This section to be moved to a generic Django Templating page]
<p> In <a href="/repositories/troggle/.git/tree/templates/logbookentry.html">logbookentry.html</a> you will see the Django template code <p> In <a href="/repositories/troggle/.git/tree/templates/logbookentry.html">logbookentry.html</a> you will see the Django template code
<code>{% for personlogentry in logbookentry.personlogentry_set.all %}</code> <code>{% for personlogentry in logbookentry.personlogentry_set.all %}</code>
which illustrates the for loop syntax, but also the my_object.attribute syntax, where the attribute is a one-to-many link to other Objects (instances of a Class) and has the <em>function</em> "_set" applied followed by the <a href="https://docs.djangoproject.com/en/5.1/ref/models/querysets/#django.db.models.query.QuerySet.all">QuerySet function</a> ".all". The effect of the for loop is to iterate through all the "personlogentry" instances referenced by the specific "logbookentry" the page is looking at. which illustrates the for loop syntax, but also the my_object.attribute syntax, where the attribute is a one-to-many link to other Objects (instances of a Class) and has the <em>function</em> "_set" applied followed by the <a href="https://docs.djangoproject.com/en/5.1/ref/models/querysets/#django.db.models.query.QuerySet.all">QuerySet function</a> ".all". The effect of the for loop is to iterate through all the "personlogentry" instances referenced by the specific "logbookentry" the page is looking at.
<p>For the relationship between LogBookEntry and PersonLogEntry click on
<a href="../l/trogclass-1.html">the Class diagram</a> on the right.
<hr /> <hr />