AWS FlutterAmplify using DataStore - aws-amplify

Question

How can we get the User Conversations with a query. Ideal would be to do a query to the user table and get all the user conversations loaded.
example:
final user = await Amplify.DataStore.query(User.classType, where: User.ID.eq(id))
user.conversations to have the list of conversations loadd.
If that can not be done, next would be to get all the conversations that have a specific User.
example not working:
await Amplify.DataStore.query(UserConversation.classType
where: UserConversation.USER.eq(user.id)
)
type Message #model #auth(rules: [{allow: public}]) {
id: ID!
ConversationId: Conversation #connection
UserId: User #connection
body: String
createdDate: AWSDateTime!
}
type Conversation #model #auth(rules: [{allow: public}]) {
id: ID!
date: AWSDateTime
readBy: [ReadBy] #connection(keyName: "byConversation", fields: ["id"])
users: [UserConversation] #connection(keyName: "byConversation", fields: ["id"])
name: String
image: String
}
type ReadBy #model #auth(rules: [{allow: public}]) #key(name: "byConversation", fields: ["conversationID"]) {
id: ID!
date: AWSDateTime
RedByUsers: User #connection
conversationID: ID
}
type User #model #auth(rules: [{allow: public}]) {
id: ID!
firstName: String
lastName: String
userImg: String
createdDate: AWSDateTime
updatedDate: AWSDateTime
email: AWSEmail
conversations: [UserConversation] #connection(keyName: "byUser", fields: ["id"])
}
type UserConversation #model(queries: null) #key(name: "byUser", fields: ["userID", "conversationID"]) #key(name: "byConversation", fields: ["conversationID", "userID"]) #auth(rules: [{allow: public}, {allow: public}]) {
id: ID!
userID: ID!
conversationID: ID!
user: User! #connection(fields: ["userID"])
conversation: Conversation! #connection(fields: ["conversationID"])
}

Answer 1

I was able to get the second version by doing the following:
await Amplify.DataStore.query(UserConversation.classType
where: User.ID.eq(user.id)
);
The above will perform a selection of all user conversations that have the user id equal to whatever the id of the user variable is. It was a bit confusing at first as to why you need to pass the User.ID for the query, but from what I understand it is due to how the SQL query gets created by AWS DataStore, it is doing a join behind the scenes and therefore will use the column of the second table (in this case the User table) to perform the join. I wish I could point to some documentation on this, but I couldn't find any. I kinda just got lucky trying a bunch of stuff and noticing in the error message how the SQL query is generated.