Aggregate function returns null GraphQL - node.js

Question

I am testing a basic aggregation function using counts from Sequelize and here's my type Counts:
type Creserve {
id: ID!
rDateStart: Date!
rDateEnd: Date!
grade: Int!
section: String!
currentStatus: String!
user: User!
cartlab: Cartlab!
}
type Counts {
section: String!
count: Int
}
type Query {
getBooking(id: ID!): Creserve!
allBookings: [Creserve]
getBookingByUser(userId: ID): Creserve
upcomingBookings: [Creserve]
countBookings: [Counts]
}
I am using countBookings as my query for aggregate functions and here's my resolver for the query:
countBookings: async (parent, args, {models}) =>
{
const res = await models.Creserve.findAndCountAll({
group: 'section',
attributes: ['section', [Sequelize.fn('COUNT', 'section'), 'count']]
});
return res.rows;
},
The query that it outputs is this:
Executing (default): SELECT "section", COUNT('section') AS "count" FROM "Creserve" AS "Creserve" GROUP BY "section";
And tried this query in my psql shell and it's working fine:
section | count
---------+-------
A | 2
R | 2
However, when I tried querying countBookings in my GraphQL Playground, section is returned but not the count:
{
"data": {
"countBookings": [
{
"section": "A",
"count": null
},
{
"section": "R",
"count": null
}
]
}
}
Is there something I missed out? Or is this a bug? This is the answer I tried following to with this example: https://stackoverflow.com/a/45586121/9760036
Thank you very much!
edit: returning a console.log(res.rows) outputs something like this:
[ Creserve {
dataValues: { section: 'A', count: '2' },
_previousDataValues: { section: 'A', count: '2' },
_changed: {},
_modelOptions:
{ timestamps: true,
validate: {},
freezeTableName: true,
underscored: false,
underscoredAll: false,
paranoid: false,
rejectOnEmpty: false,
whereCollection: null,
schema: null,
schemaDelimiter: '',
defaultScope: {},
scopes: [],
indexes: [],
name: [Object],
omitNull: false,
hooks: [Object],
sequelize: [Sequelize],
uniqueKeys: {} },
_options:
{ isNewRecord: false,
_schema: null,
_schemaDelimiter: '',
raw: true,
attributes: [Array] },
__eagerlyLoadedAssociations: [],
isNewRecord: false },
Creserve {
dataValues: { section: 'R', count: '2' },
_previousDataValues: { section: 'R', count: '2' },
_changed: {},
_modelOptions:
{ timestamps: true,
validate: {},
freezeTableName: true,
underscored: false,
underscoredAll: false,
paranoid: false,
rejectOnEmpty: false,
whereCollection: null,
schema: null,
schemaDelimiter: '',
defaultScope: {},
scopes: [],
indexes: [],
name: [Object],
omitNull: false,
hooks: [Object],
sequelize: [Sequelize],
uniqueKeys: {} },
_options:
{ isNewRecord: false,
_schema: null,
_schemaDelimiter: '',
raw: true,
attributes: [Array] },
__eagerlyLoadedAssociations: [],
isNewRecord: false } ]
Here's for res.count:
Executing (default): SELECT "section", COUNT('section') AS "count" FROM "Creserve" AS "Creserve" GROUP BY "section";
[ { count: '2' }, { count: '2' } ]

Answer 1

Problem
Actually you are doing everything right here... but what is happening here is the sequlize doesn't return plain object... It always returns the data in form of instance like that
[ Creserve {
dataValues: { section: 'A', count: '2' },
_previousDataValues: { section: 'A', count: '2' },
_changed: {},
_modelOptions:
{ timestamps: true,
Solution
I am not sure but there is no other way instead of looping and makes
response to json object...
const array = []
res.rows.map((data) => {
array.push(data.toJSON())
})
return array