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Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
...255)
class Book(models.Model):
author = models.ForeignKey(Author)
title = models.CharField(max_length=255)
admin.py (Incorrect Way) - you think it would work by using 'model__field' to reference, but it doesn't
class BookAdmin(admin.ModelAdmin):
model = Book
list_display = ['titl...
MySQL SELECT only not null values
... last not null value for each column.
Example
If you have a table:
id|title|body
1 |t1 |b1
2 |NULL |b2
3 |t3 |NULL
you get:
title|body
t3 |b2
Query
SELECT DISTINCT (
SELECT title
FROM test
WHERE title IS NOT NULL
ORDER BY id DESC
LIMIT 1
) title, (
SELECT body
FR...
How to exit a function in bash
...ou exit out of a function if a condition is true without killing the whole script, just return back to before you called the function.
...
Chrome refuses to execute an AJAX script due to wrong MIME type
I'm trying to access a script as JSON via AJAX, which works fine on Safari and other browsers but unfortunately will not execute in Chrome. It's coming with the following error:
...
Remove plot axis values
...he same as the background to match
axis_colour <- "white"
plot_title <- "Graph it!"
xlabel <- "Time"
ylabel <- "Value"
label_colour <- "black"
label_scale <- 2
axis_scale <- 2
symbol_scale <- 2
title_scale <- 2
subtitle_scale <- ...
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
... function HideORDispFeedback() { $("#feedback").toggle();}function makeTitleDraggable(element, titleElement) { let isDragging = false; let offsetX, offsetY; // 只在标题栏上按下时开始拖动 titleElement.onmousedown = function(e) { isDragging = true; offset...
Can I create a One-Time-Use Function in a Script or Stored Procedure?
...re a concept of a one-time-use, or local function declared inside of a SQL script or Stored Procedure? I'd like to abstract away some complexity in a script I'm writing, but it would require being able to declare a function.
...
What is the JSF resource library for and how should it be used?
The JSF <h:outputStylesheet> , <h:outputScript> and <h:graphicImage> components have a library attribute. What is this and how should this be used? There are a lot of examples on the web which use it as follows with the common content/file type css , js and img (or ima...
AppInventor2 .keystore 证书文件 - App版本升级的奥秘 · App Inventor 2 中文网
... function HideORDispFeedback() { $("#feedback").toggle();}function makeTitleDraggable(element, titleElement) { let isDragging = false; let offsetX, offsetY; // 只在标题栏上按下时开始拖动 titleElement.onmousedown = function(e) { isDragging = true; offset...
Capture iframe load complete event
...er is always called by attaching it before the iframe starts loading.
<script>
var iframe = document.createElement('iframe');
iframe.onload = function() { alert('myframe is loaded'); }; // before setting 'src'
iframe.src = '...';
document.body.appendChild(iframe); // add it to wherever you n...