RE: DataImportHandler WARNING: Unable to resolve variable

[Swati Swoboda]

I am getting a similar issue when while using a Template Transformer. My fields 
*always* have a value as well - it is getting indexed correctly.

Furthermore, the number of warnings I get seems arbitrary. I imported one 
document (debug mode) and I got roughly ~400 of those warning messages for the 
single field.

-----Original Message-----
From: Jon Drukman [mailto:jdruk...@gmail.com] 
Sent: Thursday, August 09, 2012 2:38 PM
To: solr-user@lucene.apache.org
Subject: DataImportHandler WARNING: Unable to resolve variable

I'm trying to use DataImportHandler's delta-import functionality but I'm 
getting loads of these every time it runs:

WARNING: Unable to resolve variable: article.url_type while parsing
expression: article:${article.url_type}:${article.id}

The definition looks like:

<entity name="article"
    query="... irrelevant ..."

    deltaQuery="select id,'dummy' as type_id FROM articles WHERE (post_date 
&gt; '${dataimporter.last_index_time}' OR updated_date &gt;
'${dataimporter.last_index_time}') AND post_date &lt;= NOW() AND status = 9"

    deltaImportQuery="select id, article_seo_title,
DATE_FORMAT(post_date,'%Y-%m-%dT%H:%i:%sZ') post_date, subject,
           body, IF(url_type='', 'article', url_type) url_type, 
featured_image_url from articles WHERE id = ${dataimporter.delta.id}"
           transformer="TemplateTransformer,HTMLStripTransformer">
            <field column="id" name="id" />
            <field column="post_date" name="post_date" />
            <field column="subject" name="title" />
            <field column="body" name="subhead" stripHTML="true" />
            <field column="type_id" template="article:${article.url_type}:${
article.id}" />
            <field column="type" template="2" />
            <field column="featured_image_url" name="main_image" />
            <field column="article_seo_title" name="seo_title" />
        </entity>

As you can see, I am always making sure that article.url_type has some value.  
Why am I getting the warning?

-jsd-