Defining and setting an expansion component using componentXML

[fatzopilot]

OK, I think I have to rethink my approach.

Thanks for the pointer!

[Isomorphic]

Records that are newly created but not yet saved have special interactivity limitations. See the Handling Unsaved Records overview for details and alternative approaches.

[fatzopilot]

For configuring the AutoChild, set propertiesOnly="true" on that <DynamicForm>, otherwise, you are actually creating a DynamicForm (equivalent to isc.DynamicForm.create(..) in JS).

Thanks, that was the missing piece in the puzzle!

Now I still wonder whether it possible to shown the expansion already while the record is created for the first time (i.e. after triggering startEditingNew)?

Thanks,
fatzopilot

[Isomorphic]

For configuring the AutoChild, set propertiesOnly="true" on that <DynamicForm>, otherwise, you are actually creating a DynamicForm (equivalent to isc.DynamicForm.create(..) in JS).

On the second issue, you're going to get the DetailViewer's default rendering for a binary field, which would normally be icons to view and download the file, but it looks like the DetailViewer thinks there is no file in this record and so is showing nothing. This would happen if the "_filename" metadata field were null.

[fatzopilot]

OK, so I figured out this code

...
<DataSource>
    <loadID>Attachment</loadID>
</DataSource>

<ListGrid dataSource="ref:Attachment" autoFetchData="true" ID="AttachmentGrid" autoDraw="false" canExpandRecords="true"  expansionMode="editor" >
	<expansionEditorProperties>
		<DynamicForm autoDraw="false">
		<fields>
			<FormItem name="ButtonItem1" title="Save record" constructor="ButtonItem"></FormItem>
		</fields>
		</DynamicForm>
	</expansionEditorProperties>
    <listEndEditAction>next</listEndEditAction>
    <showFilterEditor>true</showFilterEditor>
    <canEdit>true</canEdit>
    <canRemoveRecords>true</canRemoveRecords>
    <xsi:type>ListGrid</xsi:type>
</ListGrid>

...

which I belive is the way it should be done to show a simple button as an expansion (to start with).
But then I get

...
16:25:00.619:MUP7:WARN:Log:ClassFactory.addGlobalID: ID:'isc_DynamicForm_0' for object '[DynamicForm ID:isc_DynamicForm_0]' collides with ID of existing object '[DynamicForm ID:isc_DynamicForm_0]'. The pre-existing widget will be destroyed.
16:25:00.641:MUP7:WARN:DynamicForm:isc_DynamicForm_0:destroyed FormItem passed to setItems()/addItem(): FormItems cannot be re-used with different DynamicForms
16:25:00.801:MUP7:WARN:Log:TypeError: _2 is null
Stack from error.stack:
    unnamed(isc_c_DynamicForm_canEditFiel) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:495
    unnamed(isc_FormItem_isReadOnl) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:841
    unnamed(isc_CanvasItem_shouldDisableCanva) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:1231
    unnamed(isc_CanvasItem__createCanva) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:1199
    unnamed(isc_c_Class_invokeSupe) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:247
    unnamed(isc_c_Class_Supe) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:240
    unnamed(isc_ButtonItem__createCanva) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:1348
    unnamed(isc_CanvasItem_ini) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:1196
    unnamed(isc_Class_completeCreatio) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:284
    unnamed(isc_DynamicForm_createIte) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:212
    unnamed(isc_DynamicForm__addItem) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:198
    unnamed(isc_DynamicForm_setItem) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:192
    unnamed(isc_DynamicForm_initWidge) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Forms.js:185
    unnamed(isc_Canvas_ini) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1458
    unnamed(isc_Class_createAutoChil) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:321
    unnamed(isc_ListGrid__getStockEmbeddedComponen) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:1247
    unnamed(isc_ListGrid_getExpansionComponen) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:725
    unnamed(isc_ListGrid_expandRecor) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:712
    unnamed(isc.A.expansionFieldDefaults.recordClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:668
    unnamed(isc_ListGrid_rowClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:1214
    unnamed(anonymou) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:660
    unnamed(isc_GridRenderer__rowClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:524
    unnamed(isc_c_Class_invokeSupe) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:247
    unnamed(isc_c_Class_Supe) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:240
    unnamed(isc_GridBody__rowClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:585
    unnamed(isc_GridRenderer_clic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Grids.js:522
    unnamed(isc_Canvas_handleClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:2166
    unnamed(isc_c_EventHandler_bubbleEven) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1203
    unnamed(isc_c_EventHandler_handleClic) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1079
    unnamed(isc_c_EventHandler__handleMouseU) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1070
    unnamed(isc_c_EventHandler_handleMouseU) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1062
    unnamed(isc_c_EventHandler_dispatc) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:1234
    unnamed(anonymou) @ gwt/com.aCompany.GWTModule/sc/modules/ISC_Core.js:63
    unnamed() @ 

...

in the console. If I omit the "ButtonItem1" FormItem, the default editor expansion is shown. So what's wrong here?

Since all I want to achieve with this for now is to create an expansion component containing a single upload field, I also tried this

...
<DataSource>
    <loadID>Attachment</loadID>
</DataSource>

<ListGrid dataSource="ref:Attachment" autoFetchData="true" ID="AttachmentGrid" autoDraw="false" canExpandRecords="true"  expansionMode="detailField" detailField="file">
    <listEndEditAction>next</listEndEditAction>
    <showFilterEditor>true</showFilterEditor>
    <canEdit>true</canEdit>
    <canRemoveRecords>true</canRemoveRecords>
    <xsi:type>ListGrid</xsi:type>
</ListGrid>
...

but the expansion component consisted of nothing as a thin frame.
Note: The upload field in the expansion component should exist in addition to that in the parent grid (as the upload field in the parent list grid is not appropriate for uploading but nice for displaying purposes)

Attachment.ds.xml:

...
<DataSource ID="Attachment"
    	xmlFromConfig="true"
		beanClassName="com.aCompany.Attachment"
		dataSourceVersion="1"
		serverType="hibernate"
		autoDeriveSchema="false"
		dropExtraFields="true">
    <fields>
        <field name="id" type="sequence" title="Id" primaryKey="true" detail="false">
            <validators>
                <Validator>
                    <type>isInteger</type>
                    <stopIfFalse>true</stopIfFalse>
                    <typeCastValidator>true</typeCastValidator>
                    <defaultErrorMessage></defaultErrorMessage>
                </Validator>
            </validators>
        </field>
        <field name="lastUpdated" type="date" title="Last Updated" detail="false" canView="true">
            <validators>
                <Validator>
                    <type>isDate</type>
                    <typeCastValidator>true</typeCastValidator>
                </Validator>
            </validators>
        </field>
        <field name="dateCreated" type="date" title="Date Created" detail="false" canView="true">
            <validators>
                <Validator>
                    <type>isDate</type>
                    <typeCastValidator>true</typeCastValidator>
                </Validator>
            </validators>
        </field>
        <field name="deleted" type="boolean" title="Deleted" detail="false" canView="true">
            <validators>
                <Validator>
                    <type>isBoolean</type>
                    <typeCastValidator>true</typeCastValidator>
                    <defaultErrorMessage></defaultErrorMessage>
                </Validator>
            </validators>
        </field>
        <field name="file" type="imageFile" title="File" detail="false" canFilter="false"></field>
     	<field name="file_filename" type="text" title="File name" detail="true"></field>
        <field name="file_filesize" type="integer" title="File size" detail="true"></field>
        <field name="file_date_created" type="date" title="File date created" detail="true"></field>
    </fields>
    <allowAdvancedCriteria>true</allowAdvancedCriteria>
    <xmlFromConfig>true</xmlFromConfig>
</DataSource>
...

So, what's the correct syntax to configure an AutoChild via ComponentXML?
A related question: Is it possible shown the expansion already while the record is created for the first time (i.e. after triggering startEditingNew)?

Thanks,
fatzopilot

[Isomorphic]

You're not really talking about a component definition, but a set of properties that could be used to create multiple components (since that's how getExpansionComponent() works).

For any of the built-in expansion modes, there's a corresponding AutoChild that you can configure via Component XML normally.

[fatzopilot]

OK, I see. So there is no way to simply set (without subclassing the Grid) an componentXML definition (e.g. a form) as an expansion? Imo, that would make a lot of sense since it is basically UI design and it wouldn't interrupt your componentXML based UI design workflow by having to resort to plain old java, if all you'd like to do is to display a slightly modified version of the default details form or the like.

[Isomorphic]

You can use any of the built-in modes via Component XML.

Defining an override for getExpansionComponent() would require subclassing ListGrid and using the "constructor" attribute (and this is only possible in 4.0+ - see the Reflection overview).

[fatzopilot]

Is that possible? I am not able to figure out a working syntax.

Thanks,
fatzopilot