Gorm Сoncurrent map writes while parsing table

While running the code below, there is a chance of running into an error "fatal error: concurrent map writes" It happens suddenly and need to use loop running until it fails

while go test -bench=. -benchtime=0.1s; do :; done

go 1.22.6

require (
    github.com/google/uuid v1.6.0
    gorm.io/driver/sqlite v1.5.6
    gorm.io/gorm v1.25.12
)

require (
    github.com/jinzhu/inflection v1.0.0 // indirect
    github.com/jinzhu/now v1.1.5 // indirect
    github.com/mattn/go-sqlite3 v1.14.22 // indirect
    golang.org/x/text v0.20.0 // indirect
)

package main

import (
    "github.com/google/uuid"
    "gorm.io/driver/sqlite"
    "gorm.io/gorm"
    "gorm.io/gorm/schema"
    "math/rand/v2"
    "sync"
    "testing"
)

type Data1 struct {
    UUID uuid.UUID `gorm:"primaryKey;type:uuid"`
}

type Data2 struct {
    UUID uuid.UUID `gorm:"primaryKey;type:uuid"`
}

type Data3 struct {
    UUID uuid.UUID `gorm:"primaryKey;type:uuid"`
}

func BenchmarkParse(b *testing.B) {
    cacheStore := &sync.Map{}
    db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
    if err != nil {
        b.Fatalf("failed to connect database")
    }

    b.RunParallel(func(pb *testing.PB) {
        for pb.Next() {
            switch rand.IntN(2) {
            case 0:
                _, _ = schema.ParseWithSpecialTableName([]*struct {
                    Data1
                    Data2 Data2 `gorm:"foreignKey:UUID;references:UUID"`
                }{}, cacheStore, db.NamingStrategy, "")
            case 1:
                _, _ = schema.ParseWithSpecialTableName([]*struct {
                    Data1
                    Data2 Data2 `gorm:"foreignKey:UUID;references:UUID"`
                    Data3 Data3 `gorm:"foreignKey:UUID;references:UUID"`
                }{}, cacheStore, db.NamingStrategy, "")
            }
        }
    })
}

fatal error: concurrent map writes

goroutine 87 [running]:
gorm.io/gorm/schema.(*Schema).parseRelation(0xc00041e1e0, 0xc000420600)
        /home/ponywka/go/pkg/mod/gorm.io/gorm@v1.25.12/schema/relationship.go:103 +0x5d8
gorm.io/gorm/schema.ParseWithSpecialTableName({0x71bc80, 0xc000236360}, 0xc00007e000, {0x7cc6b8, 0xc0001e4000}, {0x0, 0x0})
        /home/ponywka/go/pkg/mod/gorm.io/gorm@v1.25.12/schema/schema.go:342 +0x22d8
storage.BenchmarkFind.func1(0xc00007f640)
        /home/ponywka/Projects/test3/main_test.go:38 +0x125
testing.(*B).RunParallel.func1()
        /home/ponywka/sdk/go1.22.6/src/testing/benchmark.go:797 +0xbf
created by testing.(*B).RunParallel in goroutine 11
        /home/ponywka/sdk/go1.22.6/src/testing/benchmark.go:790 +0x116

It happens for me in Find operation:

fatal error: concurrent map writes

goroutine 36 [running]:
gorm.io/gorm/schema.(*Schema).parseRelation(0xc0001f6000, 0xc0001fc800)
    /go/pkg/mod/gorm.io/gorm@v1.25.12/schema/relationship.go:103 +0x5d8
gorm.io/gorm/schema.ParseWithSpecialTableName({0x10cc9c0, 0xc0001720c0}, 0xc000893360, {0x2364c78, 0xc000895300}, {0x0, 0x0})
    /go/pkg/mod/gorm.io/gorm@v1.25.12/schema/schema.go:342 +0x22d8
gorm.io/gorm.(*Statement).ParseWithSpecialTableName(0xc000702fc0, {0x10cc9c0?, 0xc0001720c0?}, {0x0?, 0xc00055b278?})
    /go/pkg/mod/gorm.io/gorm@v1.25.12/statement.go:493 +0x65
gorm.io/gorm.(*Statement).Parse(...)
    /go/pkg/mod/gorm.io/gorm@v1.25.12/statement.go:489
gorm.io/gorm/callbacks.BuildQuerySQL(0xc00016f9e0)
    /go/pkg/mod/gorm.io/gorm@v1.25.12/callbacks/query.go:89 +0x31d
gorm.io/gorm/callbacks.Query(0xc00016f9e0)
    /go/pkg/mod/gorm.io/gorm@v1.25.12/callbacks/query.go:16 +0x36
gorm.io/gorm.(*processor).Execute(0xc00089ad70, 0xc000137e30?)
    /go/pkg/mod/gorm.io/gorm@v1.25.12/callbacks.go:130 +0x3cc
gorm.io/gorm.(*DB).Find(0xc00016f9e0?, {0x10cc9c0, 0xc0001720c0}, {0x0, 0x0, 0x0})
    /go/pkg/mod/gorm.io/gorm@v1.25.12/finisher_api.go:170 +0x134
XXX/XXX.XXX({0x235e398, 0x2d6f260})
    /src/XXX.go:XXX +0x4b4

It happens because this is where the cache is used

Pic 1 Square 1: Initializing "relation" field Pic 1 Square 2: Initializing "relation.FieldSchema" field using "getOrParse" function Pic 2 Square 1: Loading parsed value from cache Pic 1 Square 3: Mutate "relation.FieldSchema" field

Comment From: github-actions[bot]

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