9 replies

Example of setting a has_one relationship

I would appreciate an example of setting up a has_one relationship.

I have the following resources:

App.Api.Item
App.Api.Variant

App.Api.Item
App.Api.Variant

Each resource has an attribute

uuid_primary_key :id

uuid_primary_key :id

.

I want to establish a 1:1 relationship between the two resources.

So, I add the following to

App.Api.Item

App.Api.Item

relationships do
    has_one :variant, App.Api.Variant
end

relationships do
    has_one :variant, App.Api.Variant
end

I get the following errors/warnings:

warning: invalid association `variant` in schema App.Api.Item: associated schema App.Api.Variant does not have field `item_id`
  lib/app/api/resources/item.ex:1: App.Api.Item (module)

** (EXIT from #PID<0.96.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Api.Item]
 relationships -> variant:
  Relationship `variant` expects destination field `item_id` to be defined on App.Api.Variant

warning: invalid association `variant` in schema App.Api.Item: associated schema App.Api.Variant does not have field `item_id`
  lib/app/api/resources/item.ex:1: App.Api.Item (module)

** (EXIT from #PID<0.96.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Api.Item]
 relationships -> variant:
  Relationship `variant` expects destination field `item_id` to be defined on App.Api.Variant

Do I need to define an attribute

:item_id

:item_id

in resource

App.Api.Variant

App.Api.Variant

? If so, what type would it be?

Or am I on the wrong path?

Example of setting a has_one relationship

I would appreciate an example of setting up a has_one relationship.

I have the following resources:

App.Api.Item
App.Api.Variant

App.Api.Item
App.Api.Variant

Each resource has an attribute

uuid_primary_key :id

uuid_primary_key :id

.

I want to establish a 1:1 relationship between the two resources.

So, I add the following to

App.Api.Item

App.Api.Item

relationships do
    has_one :variant, App.Api.Variant
end

relationships do
    has_one :variant, App.Api.Variant
end

I get the following errors/warnings:

warning: invalid association `variant` in schema App.Api.Item: associated schema App.Api.Variant does not have field `item_id`
  lib/app/api/resources/item.ex:1: App.Api.Item (module)

** (EXIT from #PID<0.96.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Api.Item]
 relationships -> variant:
  Relationship `variant` expects destination field `item_id` to be defined on App.Api.Variant

warning: invalid association `variant` in schema App.Api.Item: associated schema App.Api.Variant does not have field `item_id`
  lib/app/api/resources/item.ex:1: App.Api.Item (module)

** (EXIT from #PID<0.96.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Api.Item]
 relationships -> variant:
  Relationship `variant` expects destination field `item_id` to be defined on App.Api.Variant

Do I need to define an attribute

:item_id

:item_id

in resource

App.Api.Variant

App.Api.Variant

? If so, what type would it be?

Or am I on the wrong path?

Example of setting a has_one relationship

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Example of setting a has_one relationship

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