I have a publishing site in 2013, pretty much OOTB. It has a news section as well which is where I created a bunch of news articles and everything is published.
I then went to create a CQWP on the Home Page of the Site Collection. I added the CQWP, left it at its defaults and have Pictures and Images.
Then I exported the part to get the .webpart and changed it to point at custom item and main xsl files in the style library.
I altered the Main to output all XML so I can add my custom fields and see what they look like. This is the bit of xml that does it
<xsl:template match="/"> <xmp><xsl:copy-of select="*" /></xmp> </xsl:template>
It returns this
<dsQueryResponse> <Rows> <Row ListId="FBE9959B-E067-4641-A723-B97BAF4C9330" WebId="0DB3F73A-F288-4BA6-BB88-0BFA34A1A13C" ID="22" _x007B_fa564e0f_x002D_0c70_x002D_4ab9_x002D_b863_x002D_0177e6ddd247_x007D_="Video Test Article" _x007B_94f89715_x002D_e097_x002D_4e8b_x002D_ba79_x002D_ea02aa8b7adb_x007D_="News/Pages/Video-Test-Article.aspx" _x007B_1d22ea11_x002D_1e32_x002D_424e_x002D_89ab_x002D_9fedbadb6ce1_x007D_="22" _x007B_28cf69c5_x002D_fa48_x002D_462a_x002D_b5cd_x002D_27b6f9d2bd5f_x007D_="2015-01-20 15:04:24" _x007B_1df5e554_x002D_ec7e_x002D_46a6_x002D_901d_x002D_d85a3881cb18_x007D_="Danny" _x007B_d31655d1_x002D_1d5b_x002D_4511_x002D_95a1_x002D_7a09e9b75bf2_x007D_="Simon" _x007B_8c06beca_x002D_0777_x002D_48f7_x002D_91c7_x002D_6da68bc07b69_x007D_="2015-01-19 14:21:29" _x007B_30bb605f_x002D_5bae_x002D_48fe_x002D_b4e3_x002D_1f81d9772af9_x007D_="0" _x007B_ba3c27ee_x002D_4791_x002D_4867_x002D_8821_x002D_ff99000bac98_x007D_="0x400000300c231061" _x007B_c5c4b81c_x002D_f1d9_x002D_4b43_x002D_a6a2_x002D_090df32ebb68_x007D_="" _x007B_8fca95c0_x002D_9b7d_x002D_456f_x002D_8dae_x002D_b41ee2728b85_x007D_="4493" _x007B_39360f11_x002D_34cf_x002D_4356_x002D_9945_x002D_25c44e68dade_x007D_="aspx" _x007B_543bc2cf_x002D_1f30_x002D_488e_x002D_8f25_x002D_6fe3b689d9ac_x007D_="<img alt="" src="/News/PublishingImages/Pictures_Rosie%20smalljpg.jpg?RenditionID=2" style="BORDER&#58;0px solid;" />" _x007B_43bdd51b_x002D_3c5b_x002D_4e78_x002D_90a8_x002D_fb2087f71e70_x007D_="1" _x007B_9da97a8a_x002D_1da5_x002D_4a77_x002D_98d3_x002D_4bc10456e700_x007D_="" _x007B_b9e6f3ae_x002D_5632_x002D_4b13_x002D_b636_x002D_9d1a2bd67120_x007D_="" _x007B_691b9a4b_x002D_512e_x002D_4341_x002D_b3f1_x002D_68914130d5b2_x007D_="" PubDate="Tue, 20 Jan 2015 15:04:24 GMT" FileExtension="aspx" FileSize="4493" DocumentIconImageUrl="/_layouts/15/IMAGES/ichtm.gif" ImageUrl="/News/PublishingImages/Pictures_Rosie%20smalljpg.jpg?RenditionID=2" ImageUrlAltText="" Title="Video Test Article" LinkUrl="http://sp2013.ecm.development.int/News/Pages/Video-Test-Article.aspx" Style="Default" GroupStyle="DefaultHeader" __begincolumn="True" __begingroup="False" /> </Rows> </dsQueryResponse>
I deleted the webpart off the page and then went to add a new site column. I did this at the SPSite level, called it "TeaserHome" *note no space no special chars, its a text field.
I then added this Site Column to the "Article Page" Content Type, which all my articles are based on.
I then went and set some of these values in the articles so there is some data.
I edited my .webpart and added
<property name="CommonViewFields" type="string" >TeaserHome, Text;</property>
Then I Imported the .webpart on the homepage again, and there in the XML was the TeaserHome attribute on one of the rows.
<Row TeaserHome="This is teaser home text" />
Saved the page, publish etc.
Then I re-edited the page, deleted the .webpart.
I then re-imported the webpart and re-added it.
Now the XML does not contain the attribute TeaserText, it changed to to an encoded Guid.
<Row _x007B_e605c9b0_x002D_b7a3_x002D_4d3a_x002D_884c_x002D_4879742a0c47_x007D_="This is teaser home text" />
**I cut out most the attribs this time but you get the idea.*
Every subsequent import and re-add now has a GUID for a field name, which is no good, it should be its Internal Name. Adding a DataColumnRename makes no difference.
The Column did not change I can go and query the list, site columns etc, I never touched it or renamed it or nothing.
I repeated these steps and it happened again, with a brand new site column first time round it works, delete and re-add the part and the field names some stupid encoded guid, which then of course I can't reference in my XSLT (maybe I could try and reference the Guid but that would be a stupid thing to do, the name should work).
I have to be able to delete and add web parts without worrying about some key functionality breaking.
Does anyone have a solution to this.