Django template include javascript

However I would like to point out major implementation limitation here. If you are planning to put your javascript code in different file and include that file in your template. This won't work. This works only when you main template and javascript code is in same file. Probably django team can address this limitation. Note, that if you want to pass a variable to an external. I've been struggling with this too.

On the surface it seems that the above solutions should work. This basically means that any solution including. The simple solution I eventually came up with, and worked for me, was to simply wrap the variable with a tag with id and later refer to it in the js file, like so:.

Of course this is only about getting the content. Regarding security, just follow the other answers. I use this way in Django 2. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 13 years, 1 month ago.

Active 1 year, 1 month ago. Viewed k times. Add a comment. Active Oldest Votes. Having said that, you can put this kind of substitution into your JavaScript.

Polywhirl Lott S. Lott k 75 75 gold badges silver badges bronze badges. Note though that according to this solution , this is vulnerable to injection attacks — Casebash. Show 6 more comments.

Yaroslav Admin Yaroslav Admin That is nice because it allows copying only some Django template input variables to Javascript and server-side code does not need to know which data structures must be used by Javascript and hence converted to JSON before rendering the Django template. Either use this or always copy all Django variables to Javascript. But note: stackoverflow. JorgeOrpinel No, it is not same. How do you then display the variable in the django template?

Sandi back when I posted it it was common to have a widget in separate JS file and initialize it in the page source code. But you can not use it in JS files as you noticed , so it has its limitations. Show 4 more comments. If it's something that won't alter a database or won't be sent to a database query this would be fine.

Django is a python framework for web development which works on jinja2 templating engine. When data is rendered along with the template after passing through views.

As django is a backend framework, hence to use the power of python to use that data dynamically requests need to be generated. But without making any call to the backend the only way to use that data dynamically is to pass it to JavaScript. Often passing a few values to JavaScript does the trick. But sometimes the entire dictionary of data needs to passed. This can be done using JSON and django template tags.

To check more about django framework in python visit — Django Tutorial. Skip to content. Change Language. Related Articles. Luckily, by setting extra we aren't limiting ourselves to only having that many copies of the form.

We can add as many copies of the form as we realistically would need up to copies to our page even if extra is set to 1. We can add the other copies of the form to the page dynamically with JavaScript. We'll do that when we create our template for displaying the form.

Before we can do that, we need to create the view. The GET request requires that we create an instance of the formset and add it to the context. To create the formset instance, we first import the formset and then we call it in the get method.

If we just call the formset with no arguments, we will get a formset that contains a form for all Bird instances in the database. Since we want this view to only add new birds we need to prevent the displayed forms from being pre-populated with Bird instances. To do that we specific a custom queryset. We set the queryset argument to Bird. This way no birds will be pre-populated in the forms. For the POST request, we need to define a post method that handles the form when it is submitted.

First, we create an instance of the BirdFormSet. This time we include the submitted data from the request via self. Once the formset is created, we have to validate it. If the formset is valid, then we call save on the formset which creates new Bird objects and adds them to the database. Once that is complete, we redirect the user to the page with the list of birds.

If the formset is not valid, the formset is returned to the user with the appropriate error messages. Now that we have the views set up, we can create the templates that will be rendered to the user. We'll display the common name and the scientific name for each bird. The template for our add bird page will initially just show the single form we specified with extra. This inserts the management form into the page which includes hidden inputs that contain information about the number of forms being displayed and is used by Django when the form is submitted.

If it doesn't match the actual number of forms Django receives when the forms are submitted, an error will be raised. Forms in the formset are added to the page using a for loop to go through each form in the formset and render it.

The forms are rendered in HTML as:. Each field in the form gets a name and id attribute that contains a number and the name of the field. These are important because the number in both of these attributes is used to identify what form the field is a part of. For our single form, each field is part of form 0, since form numbering starts at 0.

While this template will work and allow the user to submit one bird at a time, it still doesn't allow us to add more forms if the user wants to add more than one bird.

We could have added more forms by setting extra to a different number. Instead, we are going to use JavaScript to allow the user to choose how many forms they want to submit. Since we are using formsets and have set up our views to handle a formset instead of a regular form, users can submit as many forms as they want at one time. We just need to make those forms available to them on the page.

Before we get to JavaScript, we'll add a another button to the HTML form that will be used to add additional forms to the page. To get the existing form on the page, we use document.