Using Django to rewrite URLs and transferring a parameter through JavaScript

Question

Using Django to rewrite URLs and transferring a parameter through JavaScript

Following up on my previous question, I am facing a challenge in passing a parameter to a view that is only known after the JS executes.

In my URLConf:

url(r'^person/device/program/oneday/(?P<meter_id>\d+)/(?P<day_of_the_week>\w+)/$',
therm_control.Get_One_Day_Of_Current_Thermostat_Schedule.as_view(), 
name="one-day-url"),

I have successfully passed this parameter in the URL like so:

http://127.0.0.1:8000/personview/person/device/program/oneday/149778/Monday/

In my template, I include the following:

var one_day_url = "{% url personview:one-day-url meter_id=meter_id day_of_the_week='Monday' %}";

In my JavaScript:

 $.ajax({
        type: 'GET',
        url: one_day_url ,
        dataType: "json",
        timeout: 30000,
        beforeSend: beforeSendCallback,
        success: successCallback,
        error: errorCallback,
        complete: completeCallback
    });

While this setup works fine, I need the flexibility to change the day parameter dynamically.

If I modify the JavaScript as follows:

var one_day_url = "{% url personview:one-day-url meter_id=meter_id %}";

and then

$.ajax({
        type: 'GET',
        url: one_day_url + '/Monday/',
        dataType: "json",
        timeout: 30000,
        beforeSend: beforeSendCallback,
        success: successCallback,
        error: errorCallback,
        complete: completeCallback
    });

I encounter a NoReverseMatch error while rendering. This may be due to the URLconf still expecting both parameters.

It seems changing the URL conf breaks the ability to find the view, and keeping it as-is leads to the NoREverseMatch error. Any advice would be highly appreciated.

javascript django

Answer 1

Answer №1

My typical approach involves

let day_url = "{% url personview:one-day-url meter_id=meter_id day_of_the_week='CHANGE_ME' %}";
// ...
url: day_url.replace('CHANGE_ME', 'Monday')

Answer 2

My typical approach involves

let day_url = "{% url personview:one-day-url meter_id=meter_id day_of_the_week='CHANGE_ME' %}";
// ...
url: day_url.replace('CHANGE_ME', 'Monday')

Answer 3

Answer №2

Consider utilizing a unique project specifically designed to address this particular issue...

Take note: Be cautious as this could potentially aid hackers in mapping out the website: https://github.com/Dimitri-Gnidash/django-js-utils

When not utilizing this project, I insert a default value in the URL and later substitute it with the correct value.

Therefore, opt for a complete reversal like so:

url: one_day_url.replace('/Monday/','/Caturday/')

Even if you replace "Monday" with "Monday", it will still function correctly...

Note: This somewhat unorthodox method may fail if the default value is already present earlier in the URL, so proceed with caution.

Answer 4

Consider utilizing a unique project specifically designed to address this particular issue...

Take note: Be cautious as this could potentially aid hackers in mapping out the website: https://github.com/Dimitri-Gnidash/django-js-utils

When not utilizing this project, I insert a default value in the URL and later substitute it with the correct value.

Therefore, opt for a complete reversal like so:

url: one_day_url.replace('/Monday/','/Caturday/')

Even if you replace "Monday" with "Monday", it will still function correctly...

Note: This somewhat unorthodox method may fail if the default value is already present earlier in the URL, so proceed with caution.

Answer 5

Answer №3

Instead of passing them in as part of the request data, why not utilize jQuery's get function to pass them in as parameters?

$.get("{%url personview%}", {'meter_id':"meter_id", "day_of_the_week":"monday" ...}, function(){do stuff when info is returned});

Afterwards, in your view, simply access the passed values like so:

meter = request.GET['meter_id']

This approach will enable you to effectively use the values in your view.

Answer 6

Instead of passing them in as part of the request data, why not utilize jQuery's get function to pass them in as parameters?

$.get("{%url personview%}", {'meter_id':"meter_id", "day_of_the_week":"monday" ...}, function(){do stuff when info is returned});

Afterwards, in your view, simply access the passed values like so:

meter = request.GET['meter_id']

This approach will enable you to effectively use the values in your view.

Answer 7

Answer №4

I recently encountered a similar issue where I needed to trigger a specific URL when a button was clicked. Here is my approach to solving this problem:

First, declare the URL as an attribute within the HTML:

{% for item in items %}    
  <button data-item-url="{% url view_item item.id %}">
    View Item #{{ item.id }}
  </button>
{% endfor %}

Next, use jQuery to retrieve the attribute value and proceed with the action:

var item_url = $(this).attr("data-item-url");

$.ajax({
  url: item_url,
  ...
});

Answer 8

I recently encountered a similar issue where I needed to trigger a specific URL when a button was clicked. Here is my approach to solving this problem:

First, declare the URL as an attribute within the HTML:

{% for item in items %}    
  <button data-item-url="{% url view_item item.id %}">
    View Item #{{ item.id }}
  </button>
{% endfor %}

Next, use jQuery to retrieve the attribute value and proceed with the action:

var item_url = $(this).attr("data-item-url");

$.ajax({
  url: item_url,
  ...
});

Answer 9

Answer №5

If you want to incorporate tokens into your URL and pass them as variables to your module, consider the following approach:

<script src="{{ STATIC_URL }}js/my-module.js"></script>
<script>
$(function(){
    MyModule.init(
        "{% url personview:one-day-url meter_id='0000' day_of_the_week='{day}' %}"
    );
});
</script>

// js/my-module.js
var MyModule = {
    init: function(one_day_url) {
        var id = 1, day = 'Saturday';
        this._one_day_url = one_day_url;
        console.log(this.one_day_url(id, day));

        $.ajax({
            type: 'GET',
            url: this.one_day_url(id, day),
            dataType: "json",
            timeout: 30000,
            beforeSend: beforeSendCallback,
            success: successCallback,
            error: errorCallback,
            complete: completeCallback
        });
    },
    one_day_url: function(meter_id, day) {
        return this._one_day_url.replace('0000', meter_id).replace('{day}', day);
    }
};

It's important to note that the token must adhere to the specified regex type to be resolved successfully (e.g., {meter_id} with \d+).

If you're not entirely satisfied with this solution, you can explore an alternative by creating a custom application to manage JavaScript in Django, like django.js. This allows for a cleaner implementation:

{% load js %}
{% django_js %}
{% js "js/my-module.js" %}

// js/my-module.js
var MyModule = {
    init: function() {
        var id = 1, day = 'Saturday';

        console.log(
            Django.url('personview:one-day-url', id, day),
            Django.url('personview:one-day-url', [id, day]),
            Django.url('personview:one-day-url', {
                meter_id: id,
                day_of_week: day
            })
        );

        $.ajax({
            type: 'GET',
            url: Django.url('personview:one-day-url', id, day),
            dataType: "json",
            timeout: 30000,
            beforeSend: beforeSendCallback,
            success: successCallback,
            error: errorCallback,
            complete: completeCallback
        });
    }
};

$(function(){
    MyModule.init();
});

Answer 10

If you want to incorporate tokens into your URL and pass them as variables to your module, consider the following approach:

<script src="{{ STATIC_URL }}js/my-module.js"></script>
<script>
$(function(){
    MyModule.init(
        "{% url personview:one-day-url meter_id='0000' day_of_the_week='{day}' %}"
    );
});
</script>

// js/my-module.js
var MyModule = {
    init: function(one_day_url) {
        var id = 1, day = 'Saturday';
        this._one_day_url = one_day_url;
        console.log(this.one_day_url(id, day));

        $.ajax({
            type: 'GET',
            url: this.one_day_url(id, day),
            dataType: "json",
            timeout: 30000,
            beforeSend: beforeSendCallback,
            success: successCallback,
            error: errorCallback,
            complete: completeCallback
        });
    },
    one_day_url: function(meter_id, day) {
        return this._one_day_url.replace('0000', meter_id).replace('{day}', day);
    }
};

It's important to note that the token must adhere to the specified regex type to be resolved successfully (e.g., {meter_id} with \d+).

If you're not entirely satisfied with this solution, you can explore an alternative by creating a custom application to manage JavaScript in Django, like django.js. This allows for a cleaner implementation:

{% load js %}
{% django_js %}
{% js "js/my-module.js" %}

// js/my-module.js
var MyModule = {
    init: function() {
        var id = 1, day = 'Saturday';

        console.log(
            Django.url('personview:one-day-url', id, day),
            Django.url('personview:one-day-url', [id, day]),
            Django.url('personview:one-day-url', {
                meter_id: id,
                day_of_week: day
            })
        );

        $.ajax({
            type: 'GET',
            url: Django.url('personview:one-day-url', id, day),
            dataType: "json",
            timeout: 30000,
            beforeSend: beforeSendCallback,
            success: successCallback,
            error: errorCallback,
            complete: completeCallback
        });
    }
};

$(function(){
    MyModule.init();
});

Using Django to rewrite URLs and transferring a parameter through JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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