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Jul 25, 2018 06:47 AM

I have an attachment field containing images. I see that the stored attachment object has a url property. In another formula field I would like to show just the attachement url. Any ideas?

Thanks.

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Feb 14, 2019 07:00 PM

The following formula will give you the URL for an attachment field :slightly_smiling_face:

`RIGHT(LEFT({Attachment Field}, LEN({Attachment Field}) - 1), LEN(LEFT({Attachment Field}, LEN({Attachment Field}) - 1)) - SEARCH("https://", {Attachment Field}) + 1)`

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Jun 29, 2020 12:00 PM

While this could technically be done in a single formula, it would be a *massive* formula. In cases like this, I prefer to divide and conquer, splitting the effort across more than one formula field.

To begin, I’ll take the default output from the attachment field and spread things out a bit by replacing the parentheses around the URLS with large blocks of spaces. I’ll also prepend a number that tells me how many attachments exist, which I’ll use later. This is a formula field that I named `{Expanded}`

:

```
IF(
Attachment,
((LEN(Attachment) - LEN(SUBSTITUTE(Attachment, ",", ""))) + 1)
& " - "
& SUBSTITUTE(SUBSTITUTE(Attachment, "(", REPT(" ", 100)), ")", REPT(" ", 100))
)
```

That creates the following output (shown in the field’s expanded view, and based on a three-attachment field):

The URL extraction then becomes much easier. Each URL is grabbed in a 200-character block using the `MID()`

function, and the surrounding spaces are trimmed off with the `TRIM()`

function. In my test, I found that I could grab the first URL block from my expanded string starting at the 100th character, the second at the 400th, and the third at the 700th. If you have really long filenames, these starting positions may need slight adjustments. For separation between each URL in the final output, I just used commas, but you can change that as desired. Anyway, here’s the final formula, which I put into a field named `{URLs}`

.

```
IF(
Expanded,
TRIM(MID(Expanded, 100, 200))
& IF(LEFT(Expanded, 1) > 1, ", " & TRIM(MID(Expanded, 400, 200)))
& IF(LEFT(Expanded, 1) > 2, ", " & TRIM(MID(Expanded, 700, 200)))
)
```

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Jun 30, 2020 09:26 AM

For more than three attachments, keep expanding the second formula. Notice the pattern in the `MID()`

functions:

It starts by grabbing characters beginning at position 100…

…then position 400, then position 700. In short, we’re adding 300 each time to grab the next URL. Just keep that pattern going. The next one would start at position 1000, then 1300, then 1600, etc.

Also notice the pattern in the comparisons made before grabbing each subsequent piece. Each line increases the number we’re comparing against from the start of `{Expanded}`

. The first one is just grabbed outright because we know we have at least one URL. If we have more than one—`IF(LEFT(Expanded, 1) > 1`

—we grab the next piece. If more than 2, grab the next one. Keep that pattern going as well.

Also, for more than 9 attachments, you would need to change all instances `LEFT(Expanded, 1)`

to `LEFT(Expanded, 2)`

.

A lot of programming is about finding patterns. Learn to see the patterns in the data you’re playing with, and you can write code to find things based on those patterns.

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Feb 14, 2019 05:25 PM

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Feb 14, 2019 07:00 PM

The following formula will give you the URL for an attachment field :slightly_smiling_face:

`RIGHT(LEFT({Attachment Field}, LEN({Attachment Field}) - 1), LEN(LEFT({Attachment Field}, LEN({Attachment Field}) - 1)) - SEARCH("https://", {Attachment Field}) + 1)`

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Dec 08, 2019 01:16 PM

Hey, is there a way to get only the urls separated by coma, without the file names?

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Dec 08, 2019 01:37 PM

The formula that @AlliAlosa posted will work for a single attachment. With multiple attachments, the process would be much more complex because the filenames and URLs are interspersed. You can’t write a single formula that would extract the URLs from an arbitrary number of attachments. For example, if you write a formula (or series of formulas) that can extract up to five URLs, you’ll have to revisit the code the moment you have more than five attachments.

What I suggest doing is using the sample that @AlliAlosa provided to learn how the first URL was extracted. To get the second URL, search for it using the index of the first one as a reference. Same for the third, and so on.

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Jan 09, 2020 10:41 PM

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Jan 27, 2020 09:51 AM

Hello!.. I saw your video and is amazing!!!, great work. I’ll boy some of your extensions.

Nick

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Jun 28, 2020 07:18 PM

Hello,

Thanks for that!

Would you be able to make a formula that gets up to 3 URLs if there’s up to 3 attachments in the attachment field?

I’m trying but I get confused with all the left, len, right…

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Jun 29, 2020 12:00 PM

While this could technically be done in a single formula, it would be a *massive* formula. In cases like this, I prefer to divide and conquer, splitting the effort across more than one formula field.

To begin, I’ll take the default output from the attachment field and spread things out a bit by replacing the parentheses around the URLS with large blocks of spaces. I’ll also prepend a number that tells me how many attachments exist, which I’ll use later. This is a formula field that I named `{Expanded}`

:

```
IF(
Attachment,
((LEN(Attachment) - LEN(SUBSTITUTE(Attachment, ",", ""))) + 1)
& " - "
& SUBSTITUTE(SUBSTITUTE(Attachment, "(", REPT(" ", 100)), ")", REPT(" ", 100))
)
```

That creates the following output (shown in the field’s expanded view, and based on a three-attachment field):

The URL extraction then becomes much easier. Each URL is grabbed in a 200-character block using the `MID()`

function, and the surrounding spaces are trimmed off with the `TRIM()`

function. In my test, I found that I could grab the first URL block from my expanded string starting at the 100th character, the second at the 400th, and the third at the 700th. If you have really long filenames, these starting positions may need slight adjustments. For separation between each URL in the final output, I just used commas, but you can change that as desired. Anyway, here’s the final formula, which I put into a field named `{URLs}`

.

```
IF(
Expanded,
TRIM(MID(Expanded, 100, 200))
& IF(LEFT(Expanded, 1) > 1, ", " & TRIM(MID(Expanded, 400, 200)))
& IF(LEFT(Expanded, 1) > 2, ", " & TRIM(MID(Expanded, 700, 200)))
)
```

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Jun 30, 2020 07:30 AM

Thanks for your Formula !

What would it be with more than 3 attachments ? For example 10 attachments ?

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Jun 30, 2020 09:26 AM

For more than three attachments, keep expanding the second formula. Notice the pattern in the `MID()`

functions:

It starts by grabbing characters beginning at position 100…

…then position 400, then position 700. In short, we’re adding 300 each time to grab the next URL. Just keep that pattern going. The next one would start at position 1000, then 1300, then 1600, etc.

Also notice the pattern in the comparisons made before grabbing each subsequent piece. Each line increases the number we’re comparing against from the start of `{Expanded}`

. The first one is just grabbed outright because we know we have at least one URL. If we have more than one—`IF(LEFT(Expanded, 1) > 1`

—we grab the next piece. If more than 2, grab the next one. Keep that pattern going as well.

Also, for more than 9 attachments, you would need to change all instances `LEFT(Expanded, 1)`

to `LEFT(Expanded, 2)`

.

A lot of programming is about finding patterns. Learn to see the patterns in the data you’re playing with, and you can write code to find things based on those patterns.

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Jul 01, 2020 01:00 AM

Thank you so much. You save my day ! Good Work and clear explanations.

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Jul 02, 2020 01:49 AM

Thanks so much, you have saved me hours of work!

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May 02, 2023 11:57 PM

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May 04, 2023 09:44 AM

Same issue as @Alvaro_Hernande here!! 😓

@Justin_Barrett @ScottWorld any idea on what might be happening?

Founder @Boltflow

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May 04, 2023 11:28 AM

Formulas can no longer be used to get URLs of attachments, but non-working URLs will still show up to prevent old formulas from completely breaking. (For example, an old formula might have pulled a filename out of the attachment field in addition to the URL. The URL still won't work anymore, but the filename would still be valid.)

p.s. I would encourage people to post questions about Airtable's attachment changes at TableForums.com, because all the top Airtable consultants/experts are answering questions there. I'm not sure how many of them are still monitoring this thread or are still monitoring this community anymore.

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May 09, 2023 02:54 AM

This has broken for me as well which is very frustrating.