Hi,
I have an application schema in which I am attempting feature chaining between
geo:PositionTimeSeries and multiple child instances of geo:PositionTimeSlice.
The workspace is hosted at this repository:
https://github.com/alphabetsoup/eGeodesyGeoserverWorkspace
In the dbmigrate/views/views.sql I am setting the IDs of the position time
series and slices as positions_simple and coordinateinstances_simple
respectively. When I set positions_simple:gid (the column that populates gml:id
for geo:PositionTimeSeries) to be concat('position_',mc.mark_coord_id) and the
same for coordinateinstances:pid (the feature link column) feature chaining
works but on a one-to-one basis. This is because mc.mark_coord_id is the
primary key for time slices. If I change this very same FEATURE_LINK
relationship to set
positions_simple:gid=coordinateinstances_simple:pid=concat('position_',mc.mark_id)
instead, the feature link doesn't render in the WFS 1.1.0 output. I know it is
making the correct link because when I run a query on the validTime property of
geo:PositionTimeSlice via the following query it correctly selects the
geo:PositionTimeSeries but does not populate any elements under the geo:history
tag.
<?xml version="1.0" encoding="UTF-8"?>
<wfs:GetFeature service="WFS"
version="1.1.0"
outputFormat="gml32"
xmlns:geo="urn:xml-gov-au:icsm:egeodesy:0.2"
xmlns:gml="http://www.opengis.net/gml/3.2";
xmlns:wfs="http://www.opengis.net/wfs";
xmlns:ogc="http://www.opengis.net/ogc";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xlink="http://www.w3.org/1999/xlink";
xsi:schemaLocation="http://www.opengis.net/wfs
http://schemas.opengis.net/wfs/1.1.0/wfs.xsd";>
<wfs:Query typeName="geo:PositionTimeSeries" aliases="p">
<ogc:Filter>
<And>
<ogc:PropertyIsGreaterThanOrEqualTo>
<ogc:PropertyName>geo:history/geo:PositionTimeSlice/gml:validTime/gml:TimeInstant/gml:timePosition</ogc:PropertyName>
<ogc:Function name="dateParse">
<ogc:Literal>yyyy-MM-dd</ogc:Literal>
<ogc:Literal>2016-01-03</ogc:Literal>
</ogc:Function>
</ogc:PropertyIsGreaterThanOrEqualTo>
</And>
</ogc:Filter>
</wfs:Query>
</wfs:GetFeature>
Is this a bug???
Yours in earnest,
Laurence Davies
____________________
Research Assistant in eGeodesy
CRC-SI, UNSW
Desk phone: (03) 8636 2373
Mobile: 0427 519 289
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