Geoserver WFS Feature Schema Enumeration of Strings

Question

Basically, I'm trying to limit the values that can be provided by a WFS transaction. So the original schema I've got for this simple test feature here

<xsd:complexType name="secondfeatureType">
    <xsd:complexContent>
        <xsd:extension base="gml:AbstractFeatureType">
            <xsd:sequence>
                <xsd:element maxOccurs="1" minOccurs="1" name="objectid" nillable="false" type="xsd:int"/>
                <xsd:element maxOccurs="1" minOccurs="0" name="color" nillable="true" type="xsd:string"/>
                <xsd:element maxOccurs="1" minOccurs="0" name="shape" nillable="true" type="gml:GeometryPropertyType"/>
            </xsd:sequence>
        </xsd:extension>
    </xsd:complexContent>
</xsd:complexType>
<xsd:element name="secondfeature" substitutionGroup="gml:_Feature" type="geofeatures:secondfeatureType"/>

But I want to limit the value of color to several options: 'Red', 'Green', 'Blue'

I tried creating the following schema for Geoserver to use for this feature:

<xsd:simpleType name="colorType" final="restriction">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="Red"/>
        <xsd:enumeration value="Green"/>
        <xsd:enumeration value="Blue"/>
    </xsd:restriction>
</xsd:simpleType>
<xsd:complexType name="secondfeatureType">
    <xsd:complexContent>
        <xsd:extension base="gml:AbstractFeatureType">
            <xsd:sequence>
                <xsd:element maxOccurs="1" minOccurs="1" name="objectid" nillable="false" type="xsd:int"/>
                <xsd:element maxOccurs="1" minOccurs="0" name="color" nillable="true" type="colorType"/>
                <xsd:element maxOccurs="1" minOccurs="0" name="shape" nillable="true" type="gml:GeometryPropertyType"/>
            </xsd:sequence>
        </xsd:extension>
    </xsd:complexContent>
</xsd:complexType>
<xsd:element name="secondfeature" substitutionGroup="gml:_Feature" type="geofeatures:secondfeatureType"/>

But the result is that any Insert Transaction I attempt to perform for this feature, the color value ends up being an empty string. It's the same result whether I try and create a feature with a color of "red" or deliberately bad value like "badvalue".

Is something like this even possible with GeoServer and WFS? If so, what do I need to change to make this work?

Answer 1

As far as I know, what you're attempting to do is not possible, it would require new code to be written to either:

• Make the schema configurable via UI (the xml schema snippets are a semi-working hidden hack)
• Make the schema parsing code realize that thing is really just a string (my guess is that currently something that some object describing the string restriction comes up, and the parsing code does not know what to do with it... later at runtime, there is no converter to go from the user provided input to this type describing the restriction)