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Get ID of Recently Insterted Record

Hi,

I have a table called 'payment' which has it's own ID pay_ID. I also have a table called 'payment_cash' which also holds the pay_ID and referential integrity is enforced with the 'payment' table. I insert a record into the payment table, and then I need to insert a record into the 'payment_cash' table. I need to get the pay_ID (which is an automunber) of the record i just inserted into the 'payment' table so that i can use it to insert into the 'payment_cash' table.

Hope that made sense

Thanks,

James
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jamoparisi
Asked:
jamoparisi
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3 Solutions
 
shanesuebsahakarnCommented:
How do you insert the record into the payment table? Manually, or via code?
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jamoparisiAuthor Commented:
Via Code
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Rey Obrero (Capricorn1)Commented:

       on a textbox
Me.Textbox=DMax("pay_ID","Payment")
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shanesuebsahakarnCommented:
Can you post the code that you are using to add the record?
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Emanon_ConsultingCommented:
So if your table structure is like this...

tblpayment
pay_ID----1---              tblpayment_cash
                   |              Payment_cashID
                    _____oo_Pay_ID

You only need to create two forms - one for each table.

frmpayment  would be the Parent Form
sfrmpayment_cash  would be the Child Form

you could make sfrmpayment_cash a subform on frmpayment.
then you would link master and child records with the pay_ID field.
This would create the link/relationship

You can also use a Tab control on your form to keep things pretty if need be.


Is this what you were looking for?

Cheers
M
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jamoparisiAuthor Commented:
capricorn - this db is a multiple user - i know the odds are slim that some one else would get in there, but i was hoping there was another way

The code i'm using to insert the record is nothing special -I've just created a recordset and done the INSERTs by creating SQL strings.

The way the data is setup makes it difficult to use two forms for the insert. Is there someway to get back the record that was inserted? So way of tracking how the insert affected the table?

Thanks
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shanesuebsahakarnCommented:
Hmm - if you're using an INSERT, it's going to be difficult to do. However, you can do it this way:

Dim rst As DAO.Recordset
Dim lngID As Long

Set rst = CurrentDb.OpenRecordset("MyTable")
rst.AddNew
....blah blah...
rst.Update
rst.Bookmark=rst.LastModified     '<------- this line navigates to the record that has just been added
lngID=rst!ID

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jamoparisiAuthor Commented:
looks like it will work, thanks

I still have the concern that someone else could modify the table and i'll grab the wrong ID. If this is the only way to do it - I guess I'm stuck
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Emanon_ConsultingCommented:
>>shanesuebsahakarn
RE: Is there someway to get back the record that was inserted? So way of tracking how the insert affected the table?

Could you not store the last ID in a global variable for use on the next update?
Do you update/insert using the ID from the global variable...
then once the update was successful get rid of the variable being stored and send a message that it was successful?

???


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jamoparisiAuthor Commented:
yes i definitely could - i know it's probably crazy, but I don't like the idea that someone else could enter a record and screw up the last ID

Can a single user lock and then unlock the table? - just to ensure that two people can't edit the table at the same time
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shanesuebsahakarnCommented:
Yes, you could do it that way but I'd only do that under circumstances where the ID needs to mean something. I *always* use surrogate keys, so the ID has no meaning other than being unique - so if I need to know the ID of the inserted record, this is the technique I use as it's the fastest (and in my experience) the most reliable method in a multiuser environment.

Even with storing the next/last ID, you still have potential issues when multiple users are trying to insert records, plus the additional overhead of manually keeping the ID up to date. You'd still have to open the recordset to retrieve the ID value and hold that recordset opened and locked so that other users don't update it while you're adding your record and doing stuff with it. With this method, you're leaving the absolute minimum amount of time between the record being added and the ID being retrieved. I've never seen any record conflicts personally.
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shanesuebsahakarnCommented:
jamoparisi, my comment above was directed to Emanon_Consulting, just in case there's any confusion :)
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Emanon_ConsultingCommented:
>>shanesuebsahakarn - I wasn't suggesting you were wrong - just inquiring about options...
Thanks for the note
;-D
Cheers
M
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shanesuebsahakarnCommented:
I wasn't suggesting that you were suggesting I was wrong :-) Just explaining why I'd choose to do it this way, is all.
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Emanon_ConsultingCommented:
Didn't I read somewhere that you sleep???
<grin>
I'm going there now...Catch you tomorrow! (or at least I'll try)
;-D
Cheers
M
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jamoparisiAuthor Commented:
Hey guys I came up with this solution - let me know what you think

Dim Db As Database
Dim recPay As Recordset

Dim strDiscount As String
Dim strAmount As String

Dim tempPayID As Integer

Set Db = CurrentDb


Set recPay = Db.OpenRecordset("payment")

'the function AddNew created a new record with the default value and stores it in a buffer, it does not save it to disk until the function update is called

recPay.AddNew

tempPayID = recPay("pay_ID")

recPay("personal_ID") = Forms!frm_main.personal_ID
recPay("reg_ID") = Forms!payMain.comboReg.Column(2)
recPay("status") = "Completed"
recPay("payment_type") = "Discount"

recPay.Update

strDiscount = "INSERT INTO pay_discount (type, amount, staff, pay_ID, notes) VALUES ('"
strDiscount = strDiscount & Me.txtType & "', " & Me.txtAmount & ", '" & Forms!payNewDiscount.comboStaff & "', "
strDiscount = strDiscount & tempPayID & ", '" & Me.txtNotes & "')"


Db.Execute (strDiscount)


Do you see any problems with this solution?

Thanks,

James
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shanesuebsahakarnCommented:
Looks okay to me if it's working for you :) Can't think of any problems off the top of my head.
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Rey Obrero (Capricorn1)Commented:
i would suggest of adding dbfailonerror option

 Db.Execute (strDiscount), dbFailOnError    'Rolls back updates if an error occurs
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