In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?

In a Django form, how do I make a field read-only (or disabled)? When the form is being used to create a new entry, all fields should be enabled - but when the record is in update mode some fields...

Sticky CSS Footer

Can someone help me make the original code from HTML5 Boilerplate Initializser, have the footer stick to the bottom of the browser, I've tried all manor of codes from web examples but...

need to print a list in jsp which is passed from spring controller

I am getting an error in one spring example that I am following. I am able to get input from the user and transfer the data to Spring controller where it gets updated in the database using a...

Simulate clicking elements on the page from a Chrome extension?

I need to iterate and click all the elements with the class .star_gray on page, and keep the iteration and clicking going after redirection. Running JavaScript code cannot meet the second...

A node may not be made a child of any of its descendants in django mptt

here is the models.py class Category(MPTTModel): title = models.CharField(max_length =120) name = models.CharField(max_length=120) parent = models.ForeignKey('self' ,...

Django - How to allow only the owner of a new post to edit or delete the post?

I will be really grateful if anyone can help to resolve the issue below. I have the following Django project coding. The problem is: when the browser was given "/posts/remove/<post_id>/" or...

How to make HyperlinkedModelSerializer in Django Rest Framework work for foreignkeys?

I am new to Django Rest Framework and am struggling to get my serialisations to work correctly for a foreignkey relationship between two models. I have tried to reduce my setup down to be as...

Failing to build working .jar file using ANT

I've made a simple 'AntExecutor' app in eclipse that can run ant tasks programmatically and it works. But for university purposes I need to keep it independant from IDE. So, funnily, I'm strugling...

Django - Reverse for '' not found. '' is not a valid view function or pattern name

I'm working on my project for a course and I'm totally stuck right now. I'm creating a website to sell products through paypal and the paypal return/cancel pages are not rendering properly. I've...

WildFly 12: error jboss.remoting.management.channel.registry

I am upgrading application from wildFly 8 to wildFly 12. Checked the standalone-full.xml in both the versions, looks good. The server starts, but the deployment of the ear fails with...

ant design - Modal value reset on "cancel" and "X" close button - API RESPONSE BASE REACT JS

Using .map, I mapped all cards and each card has an edit button, so when I click the edit button it opens a Modal (antd) that has a form with input values. Values are bound with API, and when I...

Vue/Nuxt async meta tags generation

We have a webpage built with vue.js and nuxt. We use nuxt generate to generate static html files, which also should contain the SEO and og tags. That's why we use nuxt's head ()to generate the...

including external javascript in Gatsby using Helmet

I have this code in the index.js of layout folder: <StaticQuery query={graphql` query SiteTitleQuery { site { siteMetadata { title } } ...

NextJS: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined

Using Nextjs and I've created an index.js in the /pages directory and created meta.js in the /components/meta/ directory. As my app rebuilds I get the following error: Element type is invalid:...

Bootstrap Table show entries Don't show exact number of Cells

with my small knowledge coding PHP I struggled about 4 days to make DataTable show exact entries what customer chose. Below is my code for getting data from Mysql DataBase <?php...

TypeError: 'Product' object is not subscriptable in Flask

I am new to python and flask, I am learning to build Flask-rest-api. I am using SQLAlchemy as the db. I tried to post data using postman to the api and I get the TypeError: Object is not...

django template styntex {% if p.category == "help" %} {% endif %} is not work

As a result of executing the code below {{p.category}} <!-- help --> {% if p.category == "help" %} <button type="button" class="btn btn btn-outline-danger btn-sm" style="color:blue;"> ...

Bitrise + Detox + React-native - Hello World Example hangs on detox.init

I'm trying to get the react-native "Hello World" app setup with Detox and running on Bitrise.io. I went through the react-native-cli getting started guide and am trying to run the simplest detox...

Django rest framework serializer: required_fields

Is it possible to set required fields as a list inside serializer? I don't want to override each fields with their type in the each line like this: name = serializers.CharField(required=True) ...

React diagram invisible and shows error at <DefaultLinkModel>

I tried using react-diagrams library and I'm facing some problems. Firstly at the line const link = port1.link<DefaultLinkModel>(port2); it shows me a error that TypeError: link.addLabel is not...

CSS :focus will not work with Bootstrap navbar

The issue is that :focus will not work in CSS. I am assuming that this might be because I am using Bootstrap, but I have tried everything that I was able to find about Bootstrap focus. Notice that...

ejs Error: Could not find matching close tag for "<%-"

I am unsure why I am getting this error. My ejs "include" syntax looks right, and I believe I entered the file paths the proper way. I looked at old stackoverflow posts and came up empty. Any...

Exclude fields when nesting serializer Django REST Framework

serializers.py class ThreadSerializer(serializers.ModelSerializer): author = UserSerializer(read_only=True) last_post_user = UserSerializer(read_only=True) class Meta: model...

JSON parse error - Expecting property name enclosed in double quotes: line 11 column 5 (char 257)"

I am following a course on the Django Rest Framework. I seem to have copied the code verbatim, however, there seems to be some error which I am unable to zero down on. What possibly could be...

Social media share preview link not working

I was trying to create a share preview link for whatsapp(fb, lkdin,..) and i have created a function that receives arguments and then helmet depending on the page where i am it would give to me...

Object of type ProductImage is not JSON serializable

I am getting this error Object of type ProductImage is not JSON serializable I am trying to make model in which I can add multiple images using ManytoManyFeild().and I then I want to serialize it...

this pixel's microdata is incomplete or incorrectly formated schema.org

I have created Facebook pixels, which connected well. When I run a debug tool, it selects sample items and lists them but once I try connecting the catalog to the pixel, it shows that the pixel is...

How can I fix "Failed to compile src/index.js 'firebase' is not defined no-undef"?

I am trying to use a React web app to read and write stuff in a Firebase realtime database. Every time I run "npm run start", I get this error message. Failed to compile src/index.js Line 25:1: ...

Generated Android espresso test fails to run, AndroidJUnitRunner failed to resolve: Landroidx/test/platform/io/FileTestStorage;

After recording a simple espresso test on my app the test fails to run and I'm hoping someone can guide me as to why this is happening. The resulting error is: D/AndroidJUnitRunner: Use the raw...

Django - How to set saved test files' URI in proper format on Windows when running locally?

So if you set MEDIA_URL under settings.py without a forward slash (this thing /, you can't do backward slashes I've tried) at the end you get ERRORS: ?: (urls.E006) The MEDIA_URL setting must end...