Enable multiple instances

[Jonathan Steele]

Currently when building the nodes, the types used are generic (TransistorShow, TransistorEpisode). This permits using multiple instances of the plugin to query different Transistor shows.

One way to allow this would be to require a new configuration key that is passed to the createNode help to generate unique types for nodes.

[Jonathan Steele]

I've been thinking about how to solve this without polluting the schema. Ideally we want a single allTransistorShow query, rather than multiple (per feed) but scoped episode queries per feed.

// gatsby-config.js
{
  resolve: `gatsby-source-transistorfm`,
  options: {
    feeds: [{
      key: `DevTyne`,
      url: `https://feeds.transistor.fm/devonthetyne`
    }]
  }
}

Then we use the key to build episode nodes specific to that feed (i.e. allDevTyneTransistorEpisode).

@notrab Thoughts?

[Jamie Barton]

@ynnoj perhaps we can follow the gatsby-source-filesystem/gatsby-source-graphql plugins that have name/typeName fields, which would make multiple allTransistorShow by default, so perhaps we look how those work under the hood to prevent it?

[Jonathan Steele]

@notrab Why would you want multiple allTransistorShow queries that only ever return one result? I don't think that comparison is fair those plugins can/will have multiple types.

gatsby-source-graphql reads a remote schema, and nodes (strictly speaking) aren't even created in the same fashion as an actual source plugin such as this one.

[Jonathan Steele]

Using multiple instances out of the box works for allTransistorShow:

    {
      resolve: 'gatsby-source-transistorfm',
      options: {
        url: 'https://feeds.transistor.fm/devonthetyne',
      },
    },
    {
      resolve: 'gatsby-source-transistorfm',
      options: {
        url: 'https://feeds.transistor.fm/first-means-everything-radio',
      },
    },

I think rather than complicating this, perhaps we just need to add the show/episode reference to the nodes?

[Jonathan Steele]

@notrab Perhaps this can be closed?