related issues

5126 gorm最新版Has Many只写入了关联数组的第一个

4796 pgsql: ON CONFLICT DO UPDATE command cannot affect row a second time

4890 Regression in 1.22.4: Storing int PKs with value zero

I think it should be

cacheKey := utils.ToStringKey(relPrimaryValues...)

not https://github.com/go-gorm/gorm/blob/f7b52bb649ba803ec149a06fec9e9da7b311d36e/callbacks/associations.go#L209

and when there's no primary keys, we should append elems

cacheKey := utils.ToStringKey(relPrimaryValues...)
if len(relPrimaryValues) == 0 || len(relPrimaryValues) != len(rel.FieldSchema.PrimaryFields) || !identityMap[cacheKey] {
        identityMap[cacheKey] = true
        if isPtr {
            elems = reflect.Append(elems, elem)
        } else {
            elems = reflect.Append(elems, elem.Addr())
        }
}

not https://github.com/go-gorm/gorm/blob/f7b52bb649ba803ec149a06fec9e9da7b311d36e/callbacks/associations.go#L210

Comment From: kaisawind

@jinzhu

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Comment From: kaisawind

https://github.com/go-gorm/gorm/pull/5221#issuecomment-1086824732

i give it up.