![]() ![]() Render("index.json-api", data: articles, opts: [ # pass data and opts as expected by `ja_serializer` Then in an API request handler, use the query builder: defmodule ArticleController do User_query = from(User, select: ) |> (params)įrom a in query, join: u in ^subquery(user_query), on: a.user_id = JsonApiQueryBuilderĭef include(query, "comments", comment_params) doįrom query, preload: ĭef include(query, "author", author_params) doįrom query, select_merge:, preload: Relationships: ["author", JsonApiQueryBuilderĭef filter(query, "tag", value), do: from(a in query, where: ^value in a.tag_list)Ĭomment_query = from(Comment, select:, distinct: true) |> (params)įrom a in query, join: c in ^subquery(comment_query), on: a.id = c.article_id blog/users?include=articles&filter=animalsįor each Ecto schema, create a related query builder module: defmodule Article doīelongs_to :author, User, foreign_key: :user_id Get all users, including related articles that have the animals tag Get all users who have an article with the animals tag blog/articles/?include=author,comments,er Get all articles, including related author, comments and comments user ![]() Get all articles, sorted by category ascending and published descending Get all articles, including only the title and description fields JSON-API Query Builder can be used to construct an efficient Ecto query to handle the following kinds of requests, in arbitrary combinations. The package can be installed by adding json_api_query_builder to your list of dependencies in mix.exs: def deps do Need a reporting tool for MySQL? Ubiq makes it easy to visualize data in minutes, and monitor in real-time dashboards.Build Ecto queries from JSON-API requests. Here is the first SQL query mentioned above, in Ubiq. Ubiq Reporting tool supports all the above SQL queries and makes it easy to visualize SQL results in different ways. mysql> select detail s->'$.spend' as spend Here is the SQL query to extract first element of array spend. Similarly, if you want to extract an array element from a JSON, then you can access them using square brackets ‘’ and index of array element. mysql> select detail s->'$.resolution.x' as widthĪlso read : How to Convert datetime to UTC in MySQL If you want to retrieve resolution.x value, that is, from an object, then you can do so using the dot (.) operator, as shown below. mysql> select id,Īlso read : How to Get Multiple Counts in Single Query in MySQL You can also use these operators in WHERE clause as shown below. Here is the SQL query to extract browser name from details column mysql> select id,Īs you can see -> returns output as quoted strings, while -> returns values as they are. > will get the string value while -> will fetch value without quotes. MySQL provides two operators ( -> and -> ) to extract data from JSON columns. How to Retrieve data from JSON column in MySQL "resolution": 'Īlso read : How to Avoid Inserting Duplicate Records in MySQL We will insert the following JSON data in our table. Let us say you have the following table users(id, details) where id is an integer and primary key while details is a JSON data type column. ![]() In this article, we will look at how to query JSON column in MySQL. Sometimes you may need to search JSON array of objects, extract JSON data or retrieve JSON data in MySQL. ![]()
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