advanced custom fields - Change post value in WordPress

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How change existing value to new and keep data ?

I changed the name in ACF and now my new data is not updated

$post_desc = get_post_meta(get_the_ID(), 'post_desc', true);
$post_id = get_the_ID();

$value = get_post_custom_values(get_the_ID(), $post_desc);
foreach ($value as $values)
    update_post_meta( $post_id, 'post_desc', $post_desc );

post_desc - is new name on ACF

How change existing value to new and keep data ?

I changed the name in ACF and now my new data is not updated

$post_desc = get_post_meta(get_the_ID(), 'post_desc', true);
$post_id = get_the_ID();

$value = get_post_custom_values(get_the_ID(), $post_desc);
foreach ($value as $values)
    update_post_meta( $post_id, 'post_desc', $post_desc );

post_desc - is new name on ACF

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• advanced-custom-fields

Share Improve this question edited Nov 2, 2018 at 8:26 cybmeta 20.7k55 gold badges4747 silver badges5858 bronze badges asked Nov 2, 2018 at 7:19 gomezgomez 322 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

In order to add a new value and keep the previous values, you need to use add_post_meta() instead of update_post_meta():

$post_id = get_the_ID();
$new_post_desc = 'the new value here';

// add_post_meta() add a new field with the same name
// and keeps previous values on the database
add_post_meta( $post_id, 'post_desc', $new_post_desc );

Then, you can use get_post_custom_values() to get all values for post_desc field, but note that you are using this function incorrectly.

Instead of:

$values = get_post_custom_values(get_the_ID(), $post_desc);

It should be:

$values = get_post_custom_values( 'post_desc', get_the_ID() );

where 'post_desc' (not $post_desc) is the name or the field.

If you want to update one specific value previously set for that field, you can use update_post_meta() passing the previous value you want to update as the fourth parameter:

update_post_meta( $post_id, 'post_desc', 'new_value', 'previous_value' );

How change existing value to new and keep data ?

I changed the name in ACF and now my new data is not updated

$post_desc = get_post_meta(get_the_ID(), 'post_desc', true);
$post_id = get_the_ID();

$value = get_post_custom_values(get_the_ID(), $post_desc);
foreach ($value as $values)
    update_post_meta( $post_id, 'post_desc', $post_desc );

post_desc - is new name on ACF

How change existing value to new and keep data ?

I changed the name in ACF and now my new data is not updated

$post_desc = get_post_meta(get_the_ID(), 'post_desc', true);
$post_id = get_the_ID();

$value = get_post_custom_values(get_the_ID(), $post_desc);
foreach ($value as $values)
    update_post_meta( $post_id, 'post_desc', $post_desc );

post_desc - is new name on ACF

• posts
• advanced-custom-fields

Share Improve this question edited Nov 2, 2018 at 8:26 cybmeta 20.7k55 gold badges4747 silver badges5858 bronze badges asked Nov 2, 2018 at 7:19 gomezgomez 322 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 0

In order to add a new value and keep the previous values, you need to use add_post_meta() instead of update_post_meta():

$post_id = get_the_ID();
$new_post_desc = 'the new value here';

// add_post_meta() add a new field with the same name
// and keeps previous values on the database
add_post_meta( $post_id, 'post_desc', $new_post_desc );

Then, you can use get_post_custom_values() to get all values for post_desc field, but note that you are using this function incorrectly.

Instead of:

$values = get_post_custom_values(get_the_ID(), $post_desc);

It should be:

$values = get_post_custom_values( 'post_desc', get_the_ID() );

where 'post_desc' (not $post_desc) is the name or the field.

If you want to update one specific value previously set for that field, you can use update_post_meta() passing the previous value you want to update as the fourth parameter:

update_post_meta( $post_id, 'post_desc', 'new_value', 'previous_value' );

本文标签： advanced custom fieldsChange post value in WordPress