Hi all,
Something weird just happened, i was busy with a project in Antigravity and whilst the agent were busy responding to a troubleshooting session it switched to seemingly someone else’s chat / question appeared and for moment my agent reported on someone elses project. See below. My agent responded and it got seemingly stuck with this emoji 
and then switched to someone elses question. The Italics is my session, the code section someone elses
This is concering1
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**
Hi. I'm a frontend developer and am experiencing a minor persistent problem on an existing WordPress site.
A script that I have on the site loads some properties from specific properties that are attached to that post in WordPress.
I recently added a new price "range" field (using the Advanced Custom Fields plugin).
The new code that I wrote should check if that "range" field has a value, and if so, return it. If not, it should default to the normal price field.
The problem is that the "get_field" function for my new "range" field is returning NULL on the single post page, even though the field is clearly filled in on the backend. It however works perfectly on another search results page that uses the same logic. Let me show you.
On the search results page, I have this:
php
<?php
...
$price = get_field( 'price' );
$price_range = get_field( 'price_range' );
if ($price_range) {
$current_price = $price_range;
} else {
$current_price = $price;
}
...
?>
I display the $current_price variable in my template file, and it is correct.
On my single-property page, I have this:
php
<?php
...
global $post;
$price = get_field( 'price', $post->ID );
$price_range = get_field( 'price_range', $post->ID );
if ($price_range) {
$current_price = $price_range;
} else {
$current_price = $price;
}
...
?>
I display the $current_price variable in my template file, and it only ever shows the $price. I used var_dump() on $price_range and it returned NULL.
Can you help me?
It's likely I've forgotten something simple, given that the same exact logic is being used elsewhere and it works.
I'm happy to provide you more code from the template files if needed.
If you're using `get_field()` in a template file, ACF is pretty smart about knowing what post you're on even without passing the ID. Have you tried simply removing `$post->ID` and just calling `get_field('price_range')`?
Also, check the field name and key in ACF. Make sure price_range in your code exactly matches the field name in the ACF settings. Sometimes a tiny typo or a trailing space can cause issues.
If that doesn't work, is it possible that get_field('price_range', $post->ID) is being called before the global $post object is fully initialized? Usually, it's better to use get_the_ID() instead of $post->ID inside the loop or in a single post template.
Lastly, double-check that the field 'price_range' is actually assigned to the post type you're viewing. If the ACF location rules aren't set up correctly for the single-property page, get_field() might return NULL even if there's data in the database.
A few quick answers:
I did try removing the $post->ID, no change.
Checked the field name, copied and pasted it just to be sure. It's correct.
I will check out get_the_ID() but that actually gives me an idea...
I also checked the ACF field group location rules, but again, given that I can actually see and edit the field on the backend for that post, it's definitely assigned to it.
So, looking at your thought about get_the_ID(), I looked into the template file some more and found this:
php
<?php
$id = get_the_ID();
$property_data = get_post($id);
setup_postdata($property_data);
$price = get_field( 'price', $id );
$price_range = get_field( 'price_range', $id );
...
?>
And then I did a var_dump($id) and discovered something interesting. It was returning the ID for an entirely different post.
Turns out that the single-property page was using some custom logic to fetch a "featured property" at the top of the file, and that was overriding the global $post object before my code even ran.
A quick wp_reset_postdata() after that featured property block solved everything.
I told you it was something simple! I just needed to look a little further up the file.
Thanks!
Verify the field name in your ACF settings. Just in case you've got a typo there?
Copy-pasted it to be sure - no typo.
Check the single template code preceding where you fetch the values and make sure the loop hasn't been modified by something like get_posts or a new WP_Query without the original's post data being reset (using wp_reset_postdata or similar).
This is my guess too. Happens more often than you'd think!
Exactly what happened. See my other reply for more details.
Try get_queried_object_id() as sometimes $post is weird even on single pages.
If it works on the archive but not the single, $post->ID probably isn't what you think it is.
Try get_the_ID() instead, or even better, on a single template use get_queried_object_id().
This was exactly it. See my other comment. Something above was setting the global $post ID to something else.
Are you inside or outside "the loop"?
Common issue. Use get_the_ID() instead of $post->ID - it's much safer and more reliable. Also check that you haven't got another secondary loop earlier in the template that's messed up the global $post variable. Adding a wp_reset_postdata() after any custom WP_Query/get_posts calls is essential.
Is the price range field a field within a repeater group? If it is, get_field( 'price_range' ) will return null as it expects the row it's in.
Inside a field group, use get_sub_field('price_range')
If you're trying to get a field that is inside a group, you must use the prefix: get_field('group_name_price_range')
This seems silly but check your single-prop.php or whatever and see if you ever wp_reset_postdata()
If you output $post->ID, what do you get? Is it the ID of the current post?
Is it possible that some other query above it changed the global $post?
What if you use get_queried_object_id() instead of $post->ID?
Sometimes you have to use the field key instead of the field name in get_field(). Try that
No, don’t do this. There are rare edge cases where you use the key, but 99% of the time it is to fix a symptom of another problem (like calling the property too early, before ACF can map the name to a key). It creates code that is hard to read and hard to maintain across environments (since keys may change across DB migrations if they aren’t exported to json). Resolve the root issue.
Wait, thinking of another potential cause: the user mentioned they copy/pasted the name. If they copy pasted from the field group in the admin, did they copy the field Label or the field Name? I’ve seen this before, and standardizing naming helps prevent this. (Label: Price Range. Name: price_range).
I'm fully and painfully aware of why and when you do it lol. It's just a method to debug why a field is returning null for no apparent reason.
Gotcha, just making sure! Usually when I run into this, it ends up being poor practice from another dev and the field names aren’t set correctly. It’s a great way to verify that data is actually stored correctly in the db.
Field name definitely, as documented in my code up there it's price_range.