44 lines
988 B
Go
44 lines
988 B
Go
package document_version_repo
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import (
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"github.com/XingfenD/yoresee_doc/internal/model"
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"gorm.io/gorm"
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)
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type DocumentVersionCreateOperation struct {
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repo *DocumentVersionRepository
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docVersion *model.DocumentVersion
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tx *gorm.DB
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}
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func (repo *DocumentVersionRepository) Create(docVersion *model.DocumentVersion) *DocumentVersionCreateOperation {
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return &DocumentVersionCreateOperation{
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repo: repo,
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docVersion: docVersion,
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}
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}
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func (op *DocumentVersionCreateOperation) WithTx(tx *gorm.DB) *DocumentVersionCreateOperation {
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op.tx = tx
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return op
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}
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func (op *DocumentVersionCreateOperation) Exec() error {
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if op.tx == nil {
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op.tx = op.repo.db
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}
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var maxVersion int
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err := op.tx.Model(&model.DocumentVersion{}).
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Where("document_id = ?", op.docVersion.DocumentID).
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Select("COALESCE(MAX(version), 0)").
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Scan(&maxVersion).Error
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if err != nil {
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return err
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}
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op.docVersion.Version = maxVersion + 1
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return op.tx.Create(op.docVersion).Error
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}
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