When we are working with table there are some cases we face the following error:
by: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'row' resolved to null
As per my findings, this issue will occur when we are working with LOVs in the table or with the QBE.
Working with LOVs:
Is primary is part of the LOV then you can face this issue. To fix this issue then the suggested solution is to create surrogate key.
QBE:
If you face this issue when you try to enable QBE, then make sure that you are not referring to the row in filter facets in the table columns.
By default QBE shows input textbox for all the columns, if you want to show different component like date component or LOV then Filter facets are used to render the different component when QBE is enabled.
<f:facet name="filter">
<af:selectOneChoice label="Access Mode" id="soc2" value="#{vs.filterCriteria.AccessMode}" simple="true">
<af:selectItem label="#{null}" id="si4" value="#{null}"/>
<af:selectItem label="Public" id="si5" value="1"/>
<af:selectItem label="Private" id="si6" value="0"/>
</af:selectOneChoice>
</f:facet>
If you facing 'Target Unreachable, identifier 'row' resolved to null' issue with QBE then you have to make sure that you are referring to row attribute in the filter facet.
Ex:<af:selectOneChoice label="Access Mode" id="soc2" value="#{row.bindings.pfscopeBean.AccessMode}" simple="true">
It should refer with the varstatus property like
<af:selectOneChoice label="Access Mode" id="soc2" value="#{vs.filterCriteria.AccessMode}" simple="true">
Note:
Table definition in the jsff will be like:
<af:table value="#{bindings.myVO1.collectionModel}"
var="row"
rows="#{bindings.myVO1.rangeSize}"
varstatus="vs"
.......
</af:table>
If above suggestion will not work try is by setting changeEventPolisy=ppr for the detail table iterator and the tree binding in the pageDef file