There are two tables users and activities.
I am able to join these using withGraphJoined. The response json is like this,
[
{
user: 'first',
activity: [{ type: 'act1' }, { type: 'act2' }],
},
{
user: 'second',
activity: [{ type: 'act3' }, { type: 'act2' }],
},
];
Now i want to fetch only the first activity and make current array into first activity object. {user:"second", activity:{type:"act3}}
I tried this but still i get all the activity in array.
User.query()
.withGraphJoined('activity')
.modifyGraph('activity', (builder) => builder.first());
This depends on how you define the relationship
if you want it to return a single object then the relation should use Model.HasOneRelation or Model.BelongsToOneRelation
however if you just want to return a single activity from many you can limit the results
.modifyGraph('activity', (builder) => builder.orderBy('created_at', 'desc').limit(1));
but it will still return an array with one item that you can access by activity[0]
the only way i can think of is if you manually map this first item in your then like
.then(user => {
user.activity = user.activity[0] ? user.activity[0] : {}
res.json(user)
})
to be on the safe side, you can check if the item exists first to avoid null error