Json django queryset

Json django queryset

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I know that Models. First, using Django's query operations, such as the filter method, returns a query set object.

This is an object that can't use JSON. Dumps directly, because the parameter needed to change the method is a dictionary, not a query set object.

How to Get Data Out of a Django Model and in to the HTML Template (Django Tutorial) - Part 48

Here is a suggestion: use a loop to take out every element in the query set, and then use the modified method to convert it to JSON data. Learn more. Asked 4 months ago. Active 4 months ago. Viewed 63 times. I want to convert this queryset to json.

I want to add a new key-value set to the first queryset, So I use Models. Jin-hyeong Ma Jin-hyeong Ma 37 5 5 bronze badges. I already read that comment and did, It did not work. Active Oldest Votes. Yu Xiaosheng Yu Xiaosheng Though I thought about it for a while, I knew there was a way I didn't know. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. You can use JsonResponse with values.

Simple example:. Or another approach with Django's built-in serializers :. I have to say, it is good practice to use something like marshmallow to serialize queryset. Try this:. For a efficient solution, you can use. You can specify field names in. If the goal is to build an API that allow you to access your models in JSON format I recommend you to use the django-restframework that is an enormously popular package within the Django community to achieve this type of tasks.

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Asked 7 years ago. Active 25 days ago. Viewed 77k times. I've tried json. What am I doing wrong? What didn't work?

Have you read the docs on serialising querysets? Active Oldest Votes. Simple example: from django. Mark Mishyn Mark Mishyn 1, 13 13 silver badges 23 23 bronze badges.

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I like simple JSON with it's own fields. Alex thank you, you are right. I expected that Django's serializers work in the same way as DRF serializers. Try this: serializers.

json django queryset

Eineki That's a good answer. I will go with the first solution. In your second solution, how is it possible to assign a 'key' to the data? The first tehnique is an invention of the wheel.GORM under the hood. A django app to apply filters on drf querysets using query params with validations using voluptuous.

json django queryset

The docs are long enough now that we should probably move the documentation to an actual docs directory using Sphinx. Convert your model instances and querysets into dicts and list with style. Django shape-engine is a simple implementation that will allow you to export django querysets to shapefiles. A library that will send signals on queryset data manipulation methods. It is used to avoid memory error when processing huge queryset, and also database error due to that the database pulls whole table at once.

Concurrent database modification wouldn't make some entries repeated or skipped in this process. Django Query Chunk is used to split big queries into multiple chunks for prevent too high memory usage. Add a description, image, and links to the queryset topic page so that developers can more easily learn about it.

Curate this topic. To associate your repository with the queryset topic, visit your repo's landing page and select "manage topics. Learn more. Skip to content. Here are 18 public repositories matching this topic Language: All Filter by language. Sort options. Star Code Issues Pull requests. Updated Dec 16, Go. Updated Jul 2, Python. Open Add real documentation. Read more. Updated Oct 27, Python.

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The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. This has beeing really annoying, In frameworks as Laravel this is supposed to be pretty simple, I would appreciate any help. Learn more. How to convert a queryset in django to json Ask Question. Asked 1 year, 2 months ago.

Active 4 months ago. Viewed 1k times. Juan Esteban Ladron De Guevara. Do you have any code for us to look at? When you say "my querysets has results from different models" how do you mean? Hold on, a queryset with different models? Active Oldest Votes. There are basically two problems you want to tackle: serializing data of a relation the OneToOneField ; and serializing multiple elements.

Willem Van Onsem Willem Van Onsem k 21 21 gold badges silver badges bronze badges. If you're using QuerySet. Paul 1 1 silver badge 9 9 bronze badges. Raydel Miranda Raydel Miranda Sign up or log in Sign up using Google.Your Internet Explorer version is not compatible with our shopping cart system.

Please use version 9 or higher to avoid problems with your order s. George Anderson Frontend and backend development guru, lover of all things computer Hopes to make your coder life a breeze by sharing some tips and tricks of the trade. CRUD stands for Create, Read, Update and Delete, so basically this app would work like a library shelf where we can take a look at each book data being able to modify as we want or need.

Technologies Used For this application, we will be using two very popular solutions for building user interfaces and APIs. The user interface of the application will be built using React — prior knowledge of React is not required for this tutorial. The back-end for this application will be built using Django, which is a high-level Python web framework that encourages rapid development and clean pragmatic design.

Convert django Models to JSON for response

Creating the front-end in React 2. Creating the APIs in Django 3. Download Eclipse IDE here. CodeMix can be installed from the Eclipse marketplace or via genuitec. It can also be installed directly from the Eclipse marketplace. Creating the front-end in React.

We will create our React application using the CodeMix wizard. Enter react-book-app as the name of the application in the dialog box that appears, then click finish.

The folder structure for your new CodeMix-created react application will look like:. Additional Packages. Hence, we need to install the node packages. We will be using bootstrap and fontawesome for some additional styling and for some icons. React is a component-driven library. So we need to break our app into different components. Here is the interface we are trying to build:.

The interface can be broken into different components:. It contains the book listing component and the Toggleable Book Form Component. Creating Components. We will create the components hierarchically — from the parent component. The first component to be created is the Book Dashboard component.

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The books are then passed as props to the BookList component along with some functions to handle book deletion and updates. BookDashboard also renders ToggleableBookForm and passes a function as prop which will handle book creation. State in React should be immutable, hence we go our handler functions: createNewBookupdateBookdeleteBook updates state without mutating the initial contents of a book.

Next, we need to create the BookList component for that, add the following code to index.

json django queryset

The BookList component receives books as prop, maps over it and returns an array of EditableBook components which is then rendered. EditableBook is a component that renders a Book or a BookForm if the user clicks the edit book button on the Book component.

json django queryset

It is a stateful component that stores the edit mode status in state and using that value, knows which component to render. The book component receives the details about the book as props.

It also receives some functions which handle the clicking of the edit button and the delete button.Posted by: admin December 19, Leave a comment. Try this:. If the goal is to build an API that allow you to access your models in JSON format I recommend you to use the django-restframework that is an enormously popular package within the Django community to achieve this type of tasks. Tags: djangojson.

December 31, Django Leave a comment. Questions: I have models with many to many relationships like this: class Contact models. TextField class Mail models. Questions: I am writing a Django application that has a model for People, and I have hit a snag.

Add menu. Try this: serializers. Simple example: from django. Logical or of Django many to many queries returns duplicate results December 31, Django Leave a comment Questions: I have models with many to many relationships like this: class Contact models. Django model field choices — wouldn't a dict be better?

Django: Order a model by a many-to-many field December 31, Django Leave a comment Questions: I am writing a Django application that has a model for People, and I have hit a snag. Encapsulation — why do we need it when setters are already public?This issue came up over the weekend while working on a JavaScript game I started several months ago.

I wanted an easier way to design levels, and also wanted to let users create and share their own worlds and adventures. The entire game state is stored in a JavaScript object. Writing this view was the first big hurdle. I was under the impression that the JSON data was to be accessed in self. This topic in the DRF documentation describes the. Note: If a client sends malformed content, then accessing request.

If a client sends a request with a content-type that cannot be parsed then a UnsupportedMediaType exception will be raised, which by default will be caught and return a Unsupported Media Type response. I resolved the error by adding the following to the AJAX call. One aspect of all of the debugging which was frustrating is that the sqlite3 database on my local environment does not support storing JSON data as far as I knowso I committed and pushed code to my production server on Heroku which uses PostgreSQL for each step in the debug process.

Eventually I realized that a server error on my local environment meant that everything was working correctly except for the very last step: saving the Game object. At this point I thought I was pretty close. I then added the following to the AJAX error callback:. This led me to believe that there was an issue with the data attribute being passed into the AJAX call. SO posts had many different ways, and I eventually found that the following worked:. I found this Stack Overflow answer with votes and 90, views, and was pleased that the proposed solution worked just fine.

Finally, I pressing the Save Game button gave me the long-awaited succss message: Saved! It worked. Hopefully there are not as many issues in retrieving JSON data stored in the database. One of the very next things I need to do on the backend assign a unique URL to each Game object and update that Game model rather than creating new games with each request.

Thanks for reading and feel free to leave a comment if you have any thoughts or questions or can point out something I can improve. Context This issue came up over the weekend while working on a JavaScript game I started several months ago.


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