Searching with Sequelize for an indirect relationship: How can it be done?

Within my database, there exists a relationship between Users and Roles. A User can have multiple Roles assigned to them. These Roles are connected to Activities in such a way that they can be associated with many different activities. This association allows any User with a specific Role to perform the corresponding Activity.

When using Sequelize, what is the most effective method to query whether a particular User has at least one Role granting permission to carry out a specific activity identified by an activity ID? The goal is to receive a true/false response indicating whether the User is authorized to perform the Activity before proceeding.

If we were to run a raw SQL query for this scenario, it might look something like:

SELECT EXISTS(SELECT * 
                FROM "Activity_Role" 
               WHERE "ActivityId" = 'READ_FILE' 
                 AND "RoleId" = ANY(SELECT "RoleId" 
                                      FROM "User_Role" 
                                     WHERE "UserId" = '12321') 
               LIMIT 1);

Is there a more elegant solution to achieve this without relying on a raw query?

javascriptsequelize.js

Answer №1

Test out a nested query using a conditional statement

User.getAll({
       include: [{
        model: Position,
        include : [{model : Task, where : {taskId : desiredTaskID}}]
       }]
    })

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