Automatic Sequential Numbering of Non-Sequential Items (READ JUN 9 2021 FOLLOW-UP)

The value in the “Record ID” field of the action should be the record ID from the record that triggered the automation. Delete that current value, then click the + symbol on the right end, and pick the triggering record’s record ID.

Thank you for your time, patience and explanations.
I figured I went the other way around (tried to update the control record instead of the created one).
I’m still struggling a bit with english as it’s not my mothertongue.

Once again, thank you for your work.
Cheers from the land of the baguette.

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Hi @Justin_Barrett, this post is amazing.

I’m really new to Airtable and what you explain here is pretty advance to me. Although, I was able to understand what you explain I’m far to implement it to a specific use case I want.

I would really appreciate if you could give some directions with the following.

How can I modify your base (fixed length option) to have a sequence number that resets for every new year?

For example


It is for an invoice generator I would like to create using Airtable and Google docs templates.

I did dive into this post as well (Sequential Number, Resetting Daily ) but, as I said, my knowledge is far from being able to update these bases with success.

Thank you very much for your help!


Hey @Justin_Barrett. You can omit my previous message. I figured it out but replacing the Base field in the main table with a formula that extracts the year from a “Created date” field and everything works as desired. Thanks again for sharing this post.


It’s been a little more than two years since I wrote the original post that kicked off this thread. While it was fun playing with that solution (and even using variations of it for other things), and gratifying to hear how it has helped other Airtable users, I feel the need to make something clear:

I no longer recommend the method described in this thread

Why not? Simply because there are far better ways of doing this now that weren’t available at the time I developed the original solution. Today I’d recommend an automation that runs a script. Yes, there will be a slight delay while waiting for the automation to run, but it’s still far more flexible and far less error-prone (provided that the script is written well) than my original solution.

One of these days I might put together a sample script that could be used in an automation to do this, but I’m afraid that’s pretty far down my priority list. If anyone else wants to share their scripts here, feel free!


Thank you for the formula-based solution.
I am looking forward to your script-based solution in a near future. Hope you will share your wisdom with us!

I am looking forward to the script :slight_smile:

Soooooooo…I’m starting to work on a script. For the first iteration, it’s going to be one that’s run manually from a Scripting app, but it’ll have configuration options so you can use it in different ways. This might eventually morph into a custom app, but that’s a ways down the road. Baby steps first!

Later on I might mess with converting it into something that will work in an automation, but that will mean more manual tweaks for users to configure it, plus more steps (i.e. possibly more fields) to get the trigger working correctly.


Looking forward to it!

Lots of my use case involve numbering based on different single select, for example
Incoming_category = Converting C1,C2,C3,C4,C5
Incoming_category = Manufacturing M1, M2, M3, M4, M5

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Here’s the first version of the script:

Here’s a video showing how to set it up and how it works:

I’ll start working on an automation version next. Stay tuned!


I don’t know why I didn’t think of this earlier, but it’s possible to automate this without using a script.

I’ll record a video demo next week, but below you’ll find a quick rundown of the steps for now. The test that I ran was with the same single-select field that I used in the demo video above. Because of this, the automation setup was pretty easy, but it will require more careful setup of the automation trigger depending on what type of field needs to drive the automation. I’ll run more tests next week and share what I find. Anyway, here’s what I got to work using a single-select field:

  • Create an automation that triggers when the single-select field isn’t empty.
  • The first action is a “Find records” action. Set it to find records based on a condition, with the condition being that the single-select field matches the option chosen by the triggering record. (You’ll need to use the dynamic condition feature to pick this value from the trigger step.)
  • The next (and final) action is an “Update record” action, where you’ll update the desired field (I stuck with the {Sequence ID} name as in my video above) in the triggering record with the total number of records found from the previous step (under “List properties” for the collection of records, insert the “Length” property).

The first time that an entry is selected, the “Find records” action will only find one record, so a 1 is inserted. The next time that same entry is selected, two records will be found, so a 2 will be inserted, and so on.


The only downside is that records can’t be deleted. At least one person in the discussion above expressed an interest in reusing an old number, but unfortunately that wouldn’t work with this solution. Deleting an old record will throw off the count, and the current highest number for a given item will be repeated when that item appears again. If you need to “remove” a record for some reason, you’ll have to filter it out of the view somehow (a checkbox field named {Archive} maybe?).

A simple script that counts records to find the number of the most recent one would produce the same duplicated-number result if records are deleted because there’s no way of tracking deleted records. However, if you instead “archive” records instead of deleting them—by using a system like I described above—a script could identify such archived records. In that light, perhaps a script version of an automation could have an option to allow the IDs of archived records to be reused. I’ll mull that over for a future project.


Hello Justin , Could you also share this automation step as video , please? I tried to follow the steps that you documented , but it didn’t work. I’m totally newbie to Airtable. Thanks a lot for your sharing.

Welcome to the community, @Thet_Paing! :smiley: Thanks for the reminder. I will post a video about this eventually, but the timing is unknown. Client work is keeping me extremely busy. I do want to post more videos to my YouTube channel—including demos for stuff like this—but I’m seriously struggling to find the time and energy for that. Your patience is appreciated!


Hello Justin, first of all thank you for the great solution to solve this via automation.
I´ve two more questions. Does it need a single-select field as trigger? And is there a way to fill in the ID with automations for already existing records?

Welcome to the community, @Timo_Germer! :smiley:

Any data can be a trigger, but in this case a single-select field works well because the data is fully there when the field changes and triggers the automation. If you’re manually typing and use “When record updated” as your trigger, the automation will trigger on the first few characters because that’s technically an update to the record (it doesn’t wait for you to finish typing). One way around this is to use a form field to add records because forms add the field data all at once, but that might not be ideal in all use cases. There are other ways to work around this, but they start getting messy with extra fields. That’s why I tend to prefer single-select fields as the drivers.

This is doable, but only by running a script as part of the automation, which requires your base to be in a Pro-plan workspace or higher. I’ve got such an automation script on my to-do list, but I honestly don’t know when I’ll get to it.

@Justin_Barrett Thank you for the quick reply.

I´ve one more question: When I set up the automation, I ran into a problem. The action “Find Records” is limited to 100 records. Every record beyond that gets the same result (100).
Since we have significantly more records, I am looking for a solution that is not limited to 100 records. Is there an easy way to set this up?

@Timo_Germer Not without using a script. Scripts have no limit on how many records they can retrieve (aside from memory limits, of course, but that’s not an issue I’ve heard of anyone encountering).

Ah I see. Is it easy to set up such a script that runs within an automation? I have tried your provided script. It worked perfectly - but it would have to be triggered manually each time.

As I wrote in the post just above yours from earlier today:

For a non-scripting way of doing this (i.e. low-code), I would highly recommend using Integromat. I use Integromat every single day for doing all sorts of advanced automations in Airtable, with no JavaScript necessary. There is a little bit of a learning curve with Integromat, but once you get over the learning curve, it’s extremely powerful:

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