/
context.go
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/
context.go
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//go:build go1.16
// +build go1.16
package gorm
import (
"context"
"gorm.io/gorm"
"github.com/avito-tech/go-transaction-manager/trm"
trmcontext "github.com/avito-tech/go-transaction-manager/trm/context"
)
// DefaultCtxGetter is the CtxGetter with settings.DefaultCtxKey.
var DefaultCtxGetter = NewCtxGetter(trmcontext.DefaultManager)
// CtxGetter gets Tr from trm.СtxManager by casting trm.Transaction to *gorm.DB.
type CtxGetter struct {
ctxManager trm.СtxManager
}
// NewCtxGetter returns *CtxGetter to get *gorm.DB from context.Context.
func NewCtxGetter(c trm.СtxManager) *CtxGetter {
return &CtxGetter{ctxManager: c}
}
// DefaultTrOrDB returns Tr(*gorm.DB) from context.Context or DB(*gorm.DB) otherwise.
func (c *CtxGetter) DefaultTrOrDB(ctx context.Context, db *gorm.DB) *gorm.DB {
if tr := c.ctxManager.Default(ctx); tr != nil {
return c.convert(tr)
}
return db
}
// TrOrDB returns Tr(*gorm.DB) from context.Context by trm.CtxKey or DB(*gorm.DB) otherwise.
func (c *CtxGetter) TrOrDB(ctx context.Context, key trm.CtxKey, db *gorm.DB) *gorm.DB {
if tr := c.ctxManager.ByKey(ctx, key); tr != nil {
return c.convert(tr)
}
return db
}
func (c *CtxGetter) convert(tr trm.Transaction) *gorm.DB {
if tx, ok := tr.Transaction().(*gorm.DB); ok {
return tx
}
return nil
}