[chaley]

Originally Posted by judyni

Thank you! Plus I'm assuming that "custom columns" are not written to epubs.

They are for me.

Steps I took to check:

1. Open the epub and check content.opf. Custom columns were not there.
2. Run polish books with "Update metadata" checked.
3. Open the ebook and check content.opf. All the custom columns were there, each separately under the attribute name "user_metadata", including ones with null values.

I don't know why I see this and BR does not.

Example of one integer custom column:

Spoiler:

<meta name="calibre:user_metadata:#myint2" content="{
&quot;is_category&quot;: false, 
&quot;#extra#&quot;: null, 
&quot;kind&quot;: &quot;field&quot;, 
&quot;is_custom&quot;: true, 
&quot;is_csp&quot;: false, 
&quot;colnum&quot;: 1, 
&quot;column&quot;: &quot;value&quot;, 
&quot;rec_index&quot;: 34, 
&quot;search_terms&quot;: [&quot;#myint2&quot;], 
&quot;link_column&quot;: &quot;value&quot;, 
&quot;is_multiple2&quot;: {}, 
&quot;is_multiple&quot;: null, 
&quot;datatype&quot;: &quot;int&quot;, 
&quot;#value#&quot;: 1, 
&quot;category_sort&quot;: &quot;value&quot;, 
&quot;table&quot;: &quot;custom_column_1&quot;, 
&quot;is_editable&quot;: true, 
&quot;label&quot;: &quot;myint2&quot;, 
&quot;display&quot;: {&quot;number_format&quot;: &quot;${0:04d}&quot;}, 
&quot;name&quot;: &quot;myint2&quot;}"/>