sending a class threw page parameters

[adrien.loyat]

Hello, I have a pobleme with page parameters.

I have generated a very simple CRUD application with seam-gen from a database containing 2 tables : col and typecol (which means the sort of col).
The link between the two tables is : col.type = typecol.id
typecol.id is an Integer


The generation is ok. The col class contain a property Typecol typecol. A colList.xhtml was generated too.

Now, I want to search for col of a certain type. So I've had a selectBox in colList.xtml :

<s:decorate template="layout/display.xhtml">
 <ui:define name="label">Type de collectivité</ui:define>
 <h:selectOneMenu id="typecol" value="#{colList.col.typecol}" >
 <s:selectItems value="#{typecolList.resultList}" var="untypcol"
 label="#{untypcol.nom}" noSelectionLabel="Select..."
 hideNoSelectionLabel="false"/>
 <s:convertEntity />
 </h:selectOneMenu>
</s:decorate>

In ColList.page.xml, I've added the param :

<param name="typecol" value="#{colList.col.typecol}" converter="EntityConverter" />

In RESTRICTION property of ColList.java, I've added this :

"col.typecol = #{colList.col.typecol}",

When I tried the new selectBox, nothing happend.
I put a conversation scope to colList class, then the search was ok. Was-it good to add conversation scope ?

Nevertheless, all is not perfect, as I cannot use links (to order the list, or to navigate between the pages of results) because my param typecol is then not written in the url( http://localhost.../ColList.seam?firstResult=25&nom=&cid=4).

Am I wrong from the beginning ? Am I wrong with the param in page.xml ?
Thank you for having a look a fiew second at my issue.
Adrien

[pmuir]

You can't use the EntityConverter like that in pages.xml. Try something like

<param name="typecolId" value="#{colList.col.typecol.id}" />

Or write a custom converter that knows how to deal with a typecol object.

[adrien.loyat]

Thanks for your help. I've made it work with a custom converter.

I've tried many changes in the param without success. I'm a bit disappointed as, to my mind, this functionality should work easily in Seam without having to write a custom converter.

Best regards.
Adrien

[pmuir]

It does, just not the way you are going about it. There is lots in the manual about this, and the examples use this.

[adrien.loyat]

I had a look at the examples but I didn't find anything looking exactly like my issue. My purpose was to, very quickly, add a new search parameter.
Maybe the way I do this is inappropriate but it seemed to me logical : I can search easily for colList.col.name (a string), so why is it difficult to search for colList.col.typecol (an entity) ? In fact, I was able to search for colList.col.typecol, but I was not able to click on the link so as to order the result because the typecol was then lost.

Sorry for my english, I try to make it comprehensible with difficulty.