Proposal: Add new method RollbackIfNotCommit to TxOrm interface

[flycash]

In work, I found that I write code looks like:

tx := o.Begin()

// ..
if err != nil {
    tx.Rollback()
    return
}

if err1 != nil {
   tx.Rollback()
   return.
}

So I proposal that add new method named RollbackIfNotCommit, so I am able to write code like:

tx := o.Begin()
defer tx.RollbackIfNotCommit
// ..
if err != nil {
    return
}

if err1 != nil {
   return.
}

tx.Commit()

[liaoyijun]

@jianzhiyao i can try

[flycash]

@liaoyijun I assigned it to you, :)