DataLoader

<DataLoader /> works similarly to, and uses, <DataSource /> but additionally exposes various common states based on the status of the loading of the data. These states are exposed as slots to enable you to easily render different elements based on the state of the data.

Use the @dataSource decorator in your repositories to define URI to async method mapping.

javascript

class SomethingRepository extends Service {
  @dataSource('/:partition/:nspace/:dc/services')
  async youCouldCallItAnythingTodoWithGettingServices(params) {
    console.log(params);
    // {partition: "partition", nspace: "nspace", dc: "dc"}
    return getTheThing(params);
  }
}

hbs

<DataLoader
  @src="/partition/nspace/dc/services"
as |loader|>
  <BlockSlot @name="loading">
    Loading...
  </BlockSlot>
  <BlockSlot @name="error">
    Error {{loader.error.status}}
  </BlockSlot>
  <BlockSlot @name="disconnected">
    Whilst we could load the initial data, something happened subsequently that
    meant we could load longer load updates to the data.
  </BlockSlot>
  <BlockSlot @name="loaded">
    {{#each loader.data as |service|}}
    {{service.Name}}

    {{/each}}
  </BlockSlot>
</DataLoader>

Attributes

Argument	Type	Default	Description
`src`	`String`		The source to subscribe to updates to, this should map to a string based URI

Exported API

Name	Type	Description
`data`	`object`	The loaded dataset once any data has been loaded successfully
`error`	`Error`	The error thrown if an error is encountered whilst loading data
`invalidate`	`function`	Invalidate the data represented by the DataLoader, therefore forcing a re-request of data for the DataLoader

Slots

Name	Description
`loading`	Rendered whilst waiting for the initial data to load.
`error`	If there is an error only whilst waiting for the initial data to load, this slot is rendered.
`disconnected`	Rendered when the initial data has already loaded, but a subsequent set of loaded data causes an error to be thrown.
`loaded`	Rendered once the initial data is loaded and on subsequent successful loads of data.

DataLoader

DataLoader

Attributes

Exported API

Slots

See