Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Using a column from a join table in the primary WHERE clause

See original GitHub issue

Hi, all.

Is it possible to produce equivalent SQL to this with findOne and some combination of includes?

SELECT * FROM Stories
INNER JOIN Contributions ON (Stories.id = Contributions.StoryId)
INNER JOIN Members AS Contributors ON (Contributions.ContributorId = Contributors.id)
WHERE (Stories.status = 'DRAFT' AND (Stories.AuthorId = 1 OR Contributors.id = 1));

It’s not clear to me from the documentation, source, or my own experimentation. Basically, I need to find a Story given either an Author id or a Contributor id, and while I can certainly run a raw query, I will also need to eager load additional associated models (which is tidier with findOne).

This is my Story model:

const Story = sequelize.define('Story', {
…
}, {
  …
  classMethods: {
    associate: (models) => {
      …
      Story.hasMany(models.Contribution, {
        foreignKey: {
          allowNull: false,
          unique: 'ContributorId_StoryId'
        },
        onDelete: 'CASCADE'
      });

      Story.belongsToMany(models.Member, {
        as: 'Contributors',
        through: models.Contribution
      });
    }
  }
});

And my join model:

const Contribution = sequelize.define('Contribution', {
  id: {
    allowNull: false,
    autoIncrement: true,
    primaryKey: true,
    type: DataTypes.INTEGER
  }
}, {
  classMethods: {
    associate: (models) => {
      Contribution.belongsTo(models.Member, {
        as: 'Contributor',
        foreignKey: {
          allowNull: false,
          unique: 'ContributorId_StoryId'
        },
        onDelete: 'CASCADE'
      });

      Contribution.belongsTo(models.Story, {
        foreignKey: {
          allowNull: false,
          unique: 'ContributorId_StoryId'
        },
        onDelete: 'CASCADE'
      });
    }
  }
});