我在 XBL 中制作自己的组件,我必须在其中使用提交。我有两个用户可以在表单生成器中提供的提交参数(资源、XPath)(例如使用自动完成控件):
<xbl:binding element="fr|myControl" id="fr-myControl" xxbl:mode="lhha binding value">
<metadata xmlns="....">
....
<templates>
<instance label=""/>
<view>
<fr:myControl id="" appearance="minimal" xpath="" xmlns="" resource="" >
<xf:label ref=""/>
<xf:hint ref=""/>
<xf:help ref=""/>
<xf:alert ref=""/>
</fr:myControl>
</view>
</templates>
<control-details>
<xf:input ref="@resource">
....
</xf:input>
<xf:input ref="@xpath">
....
</xf:input>
</control-details>
</metadata>
....
然后我想调用 REST 提交,用户在表单构建器(@resource
和@xpath
)中提供资源和结果 XPath:
<xf:model>
<xf:instance id="result"><value/></xf:instance>
<xf:instance id="sub"><value/></xf:instance>
<xf:instance id="resource"><value/></xf:instance>
<xf:instance id="xpath"><value/></xf:instance>
....
<xf:submission id="my-submission" instance="sub"
mediatype="application/xml"
method="get"
resource="{instance('resource')}"
replace="instance"
serialization="none"/>
<xf:action id="populate-data-binding">
<xf:action context="instance('sub')"
ev:event="xforms-submit-done"
ev:observer="my-submission">
<xf:action>
<!-- there is a problem-->
<xf:var as="xs:string" name="control-value" value="instance('xpath')"/>
<xf:setvalue ref="instance('result')" value="$control-value"/>
</xf:action>
</xf:action>
</xf:action>
</xf:model>
....
<xf:var name="resource-avt" xbl:attr="xbl:text=resource" xxbl:scope="outer"/>
<xf:var name="resource" xbl:attr="xbl:text=resource" >
<xf:action ev:event="xforms-enabled xforms-value-changed">
<xf:setvalue ref="instance('resource')" value="$resource"/>
</xf:action>
</xf:var>
<xf:var name="xpath-avt" xbl:attr="xbl:text=xpath" xxbl:scope="outer"/>
<xf:var name="xpath" xbl:attr="xbl:text=xpath" as="xs:string">
<xf:action ev:event="xforms-enabled xforms-value-changed">
<xf:setvalue ref="instance('xpath')" value="$xpath"/>
</xf:action>
</xf:var>
我的问题在上面突出显示的行中:在instance('xpath')
我有用户在表单生成器中提供的参数的值,例如:/pathToResult
. 我想从与/pathToResult
. 但不幸的instance('result')
是:/pathToInstance
而不是预期的结果,例如对于响应 XML:
<xml>
<blabla>bla</blabla>
<pathToResult>MY RESULT !!!</pathToResult>
</xml>
结果实例的期望值是:MY RESULT !!!
而不是/pathToResult
.
但是,如果我像这样修改代码:
<xf:var as="xs:string" name="control-value" value="/pathToResult"/>
它运作良好,但在这种情况下,路径是硬编码的。相反,我想为 Form Builder 用户提供在控件配置中指定 XPath 表达式的机会。
如何修改我的代码以达到预期效果?