modelRT/database/query_zone.go

// Package database define database operation functions
package database

import (
	"context"
	"time"

	"modelRT/orm"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
)

// QueryZoneByTagName return the result of query circuit diagram Zone info by tagName from postgresDB
func QueryZoneByTagName(ctx context.Context, tx *gorm.DB, tagName string) (orm.Zone, error) {
	var zone orm.Zone
	// ctx超时判断
	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
	defer cancel()

	result := tx.WithContext(cancelCtx).Where("TAGNAME = ? ", tagName).Clauses(clause.Locking{Strength: "UPDATE"}).Find(&zone)
	if result.Error != nil {
		return orm.Zone{}, result.Error
	}
	return zone, nil
}