How to Count/Select in subqueries?

What are you doing?

return A.findAll({
    attributes: ['id', 'attr1', 'attr2', [sequelize.fn('COUNT', '*'), 'attr3']],
    include: [{
       model: B,
       attributes: [ ],
       include: [{
           model: C,
           attributes: [ ]
       }]
    }]
   });

What do you expect to happen?

For this example, consider that there are:

• 2 records of A
• 5 records of B
• 6 records of C

SQL query:

SELECT A.`attr1`, A.`attr2`,
  (SELECT COUNT(*) FROM B, C 
   WHERE B.id = C.bId AND B.aId = A.id) AS `attr3`
FROM A;

JSON example (con):

[
  {
    "id": 1,
    "attr1": "whatever",
    "attr2": "whatever",
    "attr3": 4
  },
  {
    "id": 2,
    "attr1": "whatever",
    "attr2": "whatever",
    "attr3": 2
  }
]

What is actually happening?

SQL query:

SELECT A.attr1, A.attr2, COUNT('*') AS attr3 FROM A 
LEFT OUTER JOIN B ON A.id = B.aId 
LEFT OUTER JOIN C ON B.id = C.bId;

JSON example:

[
  {
    "id": 2,
    "attr1": "whatever",
    "attr2": "whatever",
    "attr3": 6
  }
]

Dialect: mysql / postgres / sqlite / mssql / any Dialect version: sqlite Database version: sqlite3.1.13 Sequelize version: sequelize 4.28.1 and sequelize-cli 3.2.0 Tested with latest release: Yes

[Paxa]

You can also do it with subquery:

A.findAll({
  attributes: { include: [
    [
      sequelize.literal('SELECT COUNT(*) FROM B, C WHERE B.id = C.bId AND B.aId = "A".id'),
      'attr3'
    ],
  ]}
});

[recoiladam]

You can also do it with subquery:

A.findAll({
  attributes: { include: [
    [
      sequelize.literal('SELECT COUNT(*) FROM B, C WHERE B.id = C.bId AND B.aId = "A".id'),
      'attr3'
    ],
  ]}
});

This no longer seems to work.

models.organizations.findAll({
  attributes: {
    include: [
      [
        sequelize.literal('SELECT COUNT(*) FROM farms'), 'totalFarms'
      ]
    ]
  }
}).then(data => {
  resolve(data)
}).catch(error => {
  reject(new Error(error))
})

Builds an invalid query:

'SELECT `id`, `uuid`, `salesUserId`, `name`, `isActive`, `isDeleted`, `createdAt`, `updatedAt`, SELECT COUNT(*) FROM farms AS `totalFarms` FROM `organizations` AS `organizations`;

Error:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT COUNT(*) FROM farms AS `totalFarms` FROM `organizations` AS `organization' at line 1