Question

Update a field in database table

Asked by: Dzynit

I have the following code to update/change the post content field of the wp_posts wordpress table, but it's not actually making the change. Does anyone see an error I've made?

The $query echoed is:
UPDATE wp_posts SET post_content='[flatfile]' WHERE ID = '172'

Thanks much for the extra pair of eyes.

$query = "UPDATE $wpdb->posts SET post_content='[flatfile]' WHERE ID = '$id'"; 
echo $query;
$update = $wpdb->update($query);

                                  
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Asked On
2009-10-07 at 17:42:36ID24794539
Tags

wp_posts

,

wordpress

,

database update

,

table update

,

mysql

,

php

Topics

Blogs

,

PHP and Databases

,

WordPress

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Answers

 

by: adrian_brooksPosted on 2009-10-07 at 18:17:47ID: 25521741

Is [flatfile] a wordpress value or a static string you wish to store?

~A~

 

by: adrian_brooksPosted on 2009-10-07 at 18:19:59ID: 25521752

Also...you might want to perform a print of that query...I don't believe that your variable $wpdb->posts is ever getting interpolated.

Perhaps try wrapping it in curly braces, like this;

{$wpdb->posts}

That is the proper way to perform variable interpolation on object or array based variables.

~A~

 

by: DzynitPosted on 2009-10-07 at 18:29:24ID: 25521785

[flatfile] is a static value that  I want to store in the post_content. (and not a wordpress value)

To test the $wpdb->posts, I changed it to the actual table name (wp_posts) but it's still not making the change in the actual table.

 

by: adrian_brooksPosted on 2009-10-07 at 18:33:37ID: 25521797

Okay, fair enough with the flatfile text then.
Is the ID field actually all caps like that in the database or is it actually lowercase?

                                                                                         v
UPDATE wp_posts SET post_content='[flatfile]' WHERE ID = '172'

~A~

 

by: DzynitPosted on 2009-10-07 at 18:34:51ID: 25521808

Yes, it's all caps.

 

by: adrian_brooksPosted on 2009-10-07 at 18:35:02ID: 25521810

The only other thing I would recommend is removing the quotes from around the 172 since that field is likely a integer and not a string data type.

~A~

 

by: adrian_brooksPosted on 2009-10-07 at 18:35:52ID: 25521817

Otherwise, your query appears fine without knowing the db table structure.

~A~

 

by: DzynitPosted on 2009-10-07 at 18:55:08ID: 25521900

What part of the structure do you need?

It's MySQL, the table name is wp_posts (which by viewing the echo of the query, you can see that it's showing correctly with the global $wpdb wordpress call.

The ID number of the row is identifying the row needed to update and ID is the unique id for the table.

post_content is the field that I need to change.

 

by: DzynitPosted on 2009-10-07 at 19:01:01ID: 25521919

Below is the required format for the wordpress update query, does it make any sense to you as to where to put what?

$wpdb->update( 'table', array( 'column1' => 'value1', 'column2' => 'value2' ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) )
                                              
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by: DzynitPosted on 2009-10-07 at 19:09:39ID: 25521941

Ok, this worked:

$wpdb->update($wpdb->posts, array('post_content' => $word), array('ID' => $id), array('%s'), array('%d'));

                                              
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