如何使自動遞增領域的應用製造商從5000

Question

我的產品表，order_ID列需要從5000

開始我已經試過這樣：

if (record.Order_ID) { 
    record.Order_ID = record.Order_ID + 1; 
} 
else { 
    record.Order_ID = 5000; 
} 

Answer 1

如果您需要驅動表來實現它：

// onCreate model's event handler 
// it receives about-to-create record as parameter 
var ID_START_FROM = 5000; 

var lock = LockService.getScriptLock(); 
// we need to lock our script, to prevent IDs inconsistency 
// wait 3 seconds for script lock 
lock.waitLock(3000); 

// Run query to get latest ID 
var query = app.models.Product.newQuery(); 
query.sorting.Id._descending(); 
query.limit = 1; 

var records = query.run(); 
var next_id = records.length > 0 ? records[0].Id + 1 : ID_START_FROM; 

record.Id = next_id; 
// ...do other stuff 

lock.releaseLock(); 

如果你正在使用雲SQL數據後臺，你可以很容易地改變你的表：

ALTER TABLE Product AUTO_INCREMENT = 5000;