Update field name without losing the value

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So I have this photography website using ACF with flexible content. It has approximately 300 posts. Due to requirements, I need to update the name of some fields.

I've tried the following query:

UPDATE wp_postmeta SET meta_key = 'content_0_left_col_image_' WHERE meta_key = 'content_0_left_column_image';

UPDATE wp_postmeta SET meta_key = '_content_0_left_col_image_' WHERE meta_key = '_content_0_left_column_image';

Rows are affected (so everything's updated) but when I go ahead and try view any of the existing posts, the data inside that field is gone.

Any ideas what could be wrong?

Thanks!

So I have this photography website using ACF with flexible content. It has approximately 300 posts. Due to requirements, I need to update the name of some fields.

I've tried the following query:

UPDATE wp_postmeta SET meta_key = 'content_0_left_col_image_' WHERE meta_key = 'content_0_left_column_image';

UPDATE wp_postmeta SET meta_key = '_content_0_left_col_image_' WHERE meta_key = '_content_0_left_column_image';

Rows are affected (so everything's updated) but when I go ahead and try view any of the existing posts, the data inside that field is gone.

Any ideas what could be wrong?

Thanks!

• custom-field
• advanced-custom-fields
• sql

Share Improve this question edited May 2, 2016 at 14:52 Sumit 4,85422 gold badges2828 silver badges3636 bronze badges asked May 2, 2016 at 14:35 JohannJohann 86744 gold badges1414 silver badges3131 bronze badges 1

• 1 The query you are doing is pretty much the right way to do it, except I'm guessing you didn't rename them correctly and you only need one query. What is the meta key you originally have and what is the new one you want? Also don't forget to update the declaration of the custom field once that query is run. Keep in mind that since your query has already ran, you already renamed some meta_keys, this is why they don't appear anymore. – Tofandel Commented Mar 11, 2020 at 16:34

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1 Answer 1

Sorted by: Reset to default -1

I hope I understand the question correctly

UPDATE `wp_postmeta` SET `meta_value` = replace(meta_value, 'old_value', 'new_value') WHERE `meta_key` LIKE 'your_key'

EDIT 1 : i forgot to mention : BACKUP YOUR DATABASE BEFORE ANY TRIAL

EDIT 2 : following comment : To copy from one field to another (I got a bit confused with your naming and which value you want where , so I post the generic sentence.

UPDATE `TABLE` SET `FIELD2` = `FIELD1'

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