42 lines
873 B
Go
42 lines
873 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 DocumentVersionGetLastedOperation struct {
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repo *DocumentVersionRepository
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docID int64
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tx *gorm.DB
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}
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func (r *DocumentVersionRepository) GetLasted(docID int64) *DocumentVersionGetLastedOperation {
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return &DocumentVersionGetLastedOperation{
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repo: r,
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docID: docID,
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}
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}
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func (op *DocumentVersionGetLastedOperation) WithTx(tx *gorm.DB) *DocumentVersionGetLastedOperation {
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op.tx = tx
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return op
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}
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func (op *DocumentVersionGetLastedOperation) Exec() (int64, 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 int64
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err := op.tx.Model(&model.DocumentVersion{}).
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Where("document_id = ?", op.docID).
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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 0, err
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}
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return maxVersion, nil
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}
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