problem: web-of-trust dgraph.go doesn't set schema type on Profile so GraphQL queries don't work

[macro88]

Need to set dgraph.type = "Profile" when creating nodes. GraphQL only returns nodes with the matching type; your DQL code creates nodes without that triple.

changes in dgraph.go:

1. Add type definition in the DQL schema and keep predicates the same

func (c *Client) EnsureSchema(ctx context.Context) error {
    schema := `pubkey: string @index(exact) @upsert .
kind3CreatedAt: int @index(int) .
last_db_update: int @index(int) .
follows: [uid] @reverse .
followers: [uid] .

type Profile {
  pubkey
  follows
  followers
  kind3CreatedAt
  last_db_update
}`
    return c.dg.Alter(ctx, &api.Operation{Schema: schema})
}

2. Set dgraph.type when creating follower and followees

  followerNQuads := fmt.Sprintf(`
            _:follower <pubkey> %q .
            _:follower <dgraph.type> "Profile" .
            _:follower <kind3CreatedAt> "%d" .
            _:follower <last_db_update> "%d" .
        `, signerPubkey, kind3createdAt, lastUpdate)

  var createNQuads string
        followeeUIDs := make([]string, len(followeeList))

        for i, followee := range followeeList {
            key := fmt.Sprintf("followee_%d", i)
            if nodes, exists := bulkResult[key]; exists && len(nodes) > 0 {
                // Followee exists
                followeeUIDs[i] = nodes[0].UID
            } else {
                // Need to create followee
                blankNodeID := fmt.Sprintf("new_followee_%d", i)
                createNQuads += fmt.Sprintf("_:%s <pubkey> %q .\n", blankNodeID, followee)
                createNQuads += fmt.Sprintf("_:%s <dgraph.type> \"Profile\" .\n", blankNodeID)
                followeeUIDs[i] = "_:" + blankNodeID
            }
        }

3. Ensure type on updates that might implicitly create nodes

 setNquads := `
        uid(f) <pubkey> "` + signerPubkey + `" .
        uid(f) <dgraph.type> "Profile" .
        uid(f) <kind3CreatedAt> "` + fmt.Sprintf("%d", kind3createdAt) + `" .
        uid(f) <last_db_update> "` + fmt.Sprintf("%d", lastUpdate) + `" .`

[gsovereignty]

All added except for followers because it's a reverse edge of follows.

See if a gql query something like this works:

{
  getProfile(pubkey: "...") {
    followers: ~follows {
      pubkey
    }
  }
}