Clash Royale CLAN TAG#URR8PPP

Gorm: FirstOrCreate with has many foreign key id mapping?

I am trying to do following:

Each execution is different, so collection -> executions is a one-to-many mapping.

type Collection struct
ID int
CollectionName string gorm:"primary_key"
CommitHash string gorm:"primary_key"
Executions Execution


type Execution struct
TimeStamp time.Time
SubDomain string
CollectionID int



And Here is main

db.AutoMigrate(&Collection, &Execution)
execution := Execution
TimeStamp: time.Now(),
SubDomain: "dev"

db.Create(&execution)
collection := Collection
CollectionName: "Testing.json",
CommitHash: "123456",
Executions: Executionexecution

db.FirstOrCreate(&collection)


Current result for collection is fine -- it's not creating a new record if duplicated. But the execution record is generating all 0 for collection_id column.

After executing three times, the result will be like this:

id time_stamp subdomain collection_id
1 2018-07-31 00:18:42.341261+00 dev 1
2 2018-07-31 00:19:03.779787+00 dev 0
3 2018-07-31 00:19:15.626205+00 dev 0


while there's only one 1 Testing.json 123456 record in the collection table.

1 Testing.json 123456

How can I mapping the collection_id back correctly?
Thanks!!!

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