wave does anyone know why a Prisma mutation might not set a Prisma #orm-help

:wave: does anyone know why a Prisma mutation migh...

lewisblackwood

05/21/2018, 2:37 PM

👋 does anyone know why a Prisma mutation might not set a relation on both nodes? I have a simple one-to-one between two types:

Endpoint

and

Organisation

. When I create a new endpoint and connect it to an organisation, I can see the relation to the corresponding organisation on the endpoint. However, when I retrieve the organisation, it does not have an endpoint connected to it. I have plenty of other similar relations with different types and haven't seen this behaviour for those. Any ideas what might be the cause here?

lewisblackwood

05/21/2018, 2:40 PM

An example:

Copy code

{
  "data": {
    "organisations": [
      {
        "id": "cjhemopj50dxg0720mj3lelo4",
        "endpoint": null
      }
    ]
  }
}

Copy code

{
  "data": {
    "endpoints": [
      {
        "id": "cjhf0gk2g0ehj0720pz7k0kun",
        "organisation": {
          "id": "cjhemopj50dxg0720mj3lelo4"
        }
      }
    ]
  }
}

Vakrim

05/21/2018, 2:48 PM

can you share you how looks your datamodel for these fields?

huv1k

05/21/2018, 2:50 PM

I think you forgot connect type from other side

lewisblackwood

05/21/2018, 2:55 PM

A truncated version:

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type Organisation @model {
  endpoint: Endpoint @relation(name: "EndpointOnOrganisation")
}

Copy code

type Endpoint @model {
  organisation: Organisation! @relation(name: "EndpointOnOrganisation")
}

lewisblackwood

05/21/2018, 3:04 PM

Ah - I realised the issue! There was a typo on the name of the relation between the two models when I originally deployed. So it wasn't exactly matching. Now that the two names match, it adds the relation to both nodes.

zonofthor

05/21/2018, 5:16 PM

you can skip the @relation ... declaration, Prisma automatically creates the name for you

zonofthor

05/21/2018, 5:16 PM

less code = less possibilites for errors

lewisblackwood

05/22/2018, 10:45 AM

oh nice @zonofthor, I didn't know that! thanks 👌

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