TYPO3 gridelements: Render image from FlexForm FAL field - typo3

Question

I'm trying to render multiple FCE (gridelements content elements) of the same type. However, images are not rendered.
The flexform defining that FCE has an image field exactly like this:
<image>
<TCEforms>
<config>
<type>inline</type>
<appearance type="array">
<createNewRelationLinkTitle>LLL:EXT:myext/Resources/Private/Language/locallang_db.xlf:createNewRelationLinkTitle</createNewRelationLinkTitle>
<headerThumbnail type="array">
<field>uid_local</field>
<height>45c</height>
<width>45</width>
</headerThumbnail>
</appearance>
<foreign_field>uid_foreign</foreign_field>
<foreign_label>uid_local</foreign_label>
<foreign_match_fields type="array">
<fieldname>image</fieldname>
</foreign_match_fields>
<foreign_selector>uid_local</foreign_selector>
<foreign_selector_fieldTcaOverride type="array">
<config type="array">
<appearance type="array">
<elementBrowserAllowed>gif,jpg,jpeg,tif,tiff,bmp,pcx,tga,png,pdf,ai</elementBrowserAllowed>
<elementBrowserType>file</elementBrowserType>
</appearance>
</config>
</foreign_selector_fieldTcaOverride>
<foreign_sortby>sorting_foreign</foreign_sortby>
<foreign_table>sys_file_reference</foreign_table>
<foreign_table_field>tablenames</foreign_table_field>
<maxitems>1</maxitems>
<minitems>0</minitems>
</config>
</TCEforms>
</image>
The TypoScript defining the element looks this way:
tt_content.gridelements_pi1.20.10.setup {
3 < lib.gridelements.defaultGridSetup
3 {
stdWrap.cObject = COA
stdWrap.cObject {
10 = IMAGE
10 {
stdWrap.wrap = <div class="media-left">|</div>
file {
import.data = field:flexform_image
treatIdAsReference = 1
import.listNum = 0
}
}
}
}
}
The issue
When putting on element onto a page, the image is displayed. Putting multiple elements on the same page leads to each element rendering the image from the first FCE put onto the page. As soon as I edit an FCE (e.g. the second placed element), no images are displayed at all.
How can I solve this?

Answer 1

You need to be sure that filename is unique for every flexform field:
<foreign_match_fields type="array">
<fieldname>image</fieldname>
</foreign_match_fields>
Best is to use the real field name. For example flexform_image.

Answer 2

Here is the flexform
<T3DataStructure>
<meta>
<langDisable>1</langDisable>
</meta>
<ROOT type="array">
<type>array</type>
<el type="array">
<bgimage>
<TCEforms>
<label>Background Image</label>
<config>
<type>inline</type>
<foreign_field>uid_foreign</foreign_field>
<foreign_label>uid_local</foreign_label>
<foreign_match_fields type="array">
<fieldname>bgimage</fieldname>
</foreign_match_fields>
<foreign_selector>uid_local</foreign_selector>
<foreign_selector_fieldTcaOverride type="array">
<config type="array">
<appearance type="array">
<elementBrowserAllowed>gif,jpg,jpeg,tif,tiff,bmp,pcx,tga,png,pdf,ai</elementBrowserAllowed>
<elementBrowserType>file</elementBrowserType>
</appearance>
</config>
</foreign_selector_fieldTcaOverride>
<foreign_sortby>sorting_foreign</foreign_sortby>
<foreign_table>sys_file_reference</foreign_table>
<maxitems>1</maxitems>
<minitems>0</minitems>
</config>
</TCEforms>
</bgimage>
</el>
</ROOT>
</T3DataStructure>