TreeGrid setFetchOperation

[stonebranch2]

Hi Isomorphic,

Can you please provide me some guidance on controlling the fetch operation id used when expanding a folder?

Setting the fetch operation doesn't appear to change what SmartGWT uses.

Even though I set the fetchOperation on the TreeGrid, the default openFolder handler uses the default fetch operation.

{
    dataSource:"task", 
    operationType:"fetch", 
    data:{
        parentId:"b45ade654838491a8c8ac62da3b3460d:d335e0aaf61f409ea4673d3997250d51:2"
    }, 
...
}

I don't see the fetch using the specified operationId.

SmartClient Version: v10.1p_2017-08-10/Pro Deployment (built 2017-08-10)

Thanks

[Isomorphic]

You need to use TreeGrid.fetchOperation to set the operationId. If you need further assistance, you'll need to provide a complete repro case, as the FAQ instructs, perhaps by modifying one of our Feature Explorer samples.

[stonebranch2]

Hi Isomorphic,

As noted above, "...even though I set the fetchOperation on the TreeGrid...", it doesn't seem to use that for framework initiated fetches, for example, when a folder is opened. The operationType is fetch, and the operationId is never included.

To be clear, I use com.smartgwt.client.widgets.grid.ListGrid.setFetchOperation(String) to set our operationId. The implementation of that method is on the ListGrid class, I don't see any override on the TreeGrid.

Regards

[stonebranch2]

Hi Isomorphic,

Run the following sample module, click on the + icon next to one of the folders, and you will see the initiated fetch by the framework is not honouring the operationId which was set by treeGrid.setFetchOperation("fetchMe").

Regards

-----

EntryPoint

package com.sandbox.client;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.types.AutoFitWidthApproach;
import com.smartgwt.client.types.FetchMode;
import com.smartgwt.client.types.SelectionStyle;
import com.smartgwt.client.widgets.tree.ResultTree;
import com.smartgwt.client.widgets.tree.TreeGrid;
import com.smartgwt.client.widgets.tree.TreeGridField;
import com.smartgwt.client.widgets.tree.TreeNode;

public class Sandbox10 implements EntryPoint {

    @Override
    public void onModuleLoad() {

        TreeGrid treeGrid = new TreeGrid();
        treeGrid.setDataSource(DataSource.get("sandbox10"));
        treeGrid.setFetchOperation("fetchMe");
        treeGrid.setTitle("Sandbox10");
        treeGrid.setWidth100();
        treeGrid.setHeight100();
        treeGrid.setAutoFitFieldsFillViewport(Boolean.TRUE);
        treeGrid.setAutoFitWidthApproach(AutoFitWidthApproach.BOTH);
        treeGrid.setAutoFitFieldWidths(Boolean.TRUE);
        treeGrid.setCanAutoFitFields(Boolean.TRUE);
        treeGrid.setShowRollOver(Boolean.FALSE);
        treeGrid.setAlternateRecordStyles(Boolean.TRUE);
        treeGrid.setSelectionType(SelectionStyle.NONE);
        treeGrid.setLoadDataOnDemand(Boolean.TRUE);
        treeGrid.setDataFetchMode(FetchMode.BASIC);
        treeGrid.setAutoFetchData(Boolean.FALSE);

        TreeGridField nameField = new TreeGridField("name");
        TreeGridField idField = new TreeGridField("id");
        TreeGridField parentIdField = new TreeGridField("parentId");
        TreeGridField openField = new TreeGridField("isOpen");
        openField.setHidden(Boolean.TRUE);
        TreeGridField folderField = new TreeGridField("isFolder");
        folderField.setHidden(Boolean.TRUE);

        ResultTree properties = new ResultTree();
        properties.setDefaultIsFolder(Boolean.FALSE);
        properties.setDisableCacheSync(Boolean.TRUE);
        properties.setOpenProperty("isOpen");
        treeGrid.setDataProperties(properties);

        treeGrid.setDefaultFields(nameField, idField, parentIdField, openField, folderField);

        List<TreeNode> nodeList = new ArrayList<TreeNode>();
        nodeList.add(createNode("WF_0", "0", null, true, true));
        nodeList.add(createNode("Child_WF_1", "1", "0", false, true));
        nodeList.add(createNode("Child_WF_2", "2", "0", false, true));
        nodeList.add(createNode("Child_3", "3", "0", false, false));
        nodeList.add(createNode("Child_4", "4", "0", false, false));

        treeGrid.setInitialData(nodeList.toArray(new TreeNode[nodeList.size()]));
        treeGrid.show();
    }

    private static TreeNode createNode(String name, String id, String parentId, boolean isOpen, boolean isFolder) {
        TreeNode node = new TreeNode();
        node.setAttribute("name", id);
        node.setAttribute("id", id);
        if (parentId != null) node.setAttribute("parentId", parentId);
        if (isOpen) node.setAttribute("isOpen", isOpen);
        if (isFolder) node.setAttribute("isFolder", isFolder);
        return node;
    }
}

sandbox10.ds.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<DataSource xmlns:fmt="WEB-INF/" ID="sandbox10" serverType="generic">
    <titleField>name</titleField>
    <fields>
        <field name="id" type="text" primaryKey="true" canEdit="false">
            <title>Id</title>
        </field>
        <field name="parentId" typ="text" foreignKey="sandbox10.id" canEdit="false">
            <title>Parent Id</title>
        </field>
        <field name="name" type="text" canEdit="false">
            <title>Name</title>
        </field>
        <field name="isFolder" type="boolean" canEdit="false">
            <title>Folder</title>
        </field>
        <field name="isOpen" type="boolean" canEdit="false">
            <title>Open</title>
        </field>
    </fields>
    <serverObject lookupStyle="new" className="com.sandbox.server.Sandbox10DS"/>
    <operationBindings>
        <binding operationType="fetch" operationId="fetchMe" serverMethod="fetchMe" />
    </operationBindings>
</DataSource>

Server DS Object

package com.sandbox.server;

import com.isomorphic.datasource.DSRequest;
import com.isomorphic.datasource.DSResponse;

public class Sandbox10DS {

    public Sandbox10DS() {}

    public DSResponse fetch(final DSRequest req) {
        throw new RuntimeException("fetch method called.");
    }

    public DSResponse fetchMe(final DSRequest req) {
        throw new RuntimeException("fetchMe method called.");
    }
}

Open Folder Fetch

{
    dataSource:"sandbox10",
    operationType:"fetch",
    data:{
        parentId:"2"
    },
    textMatchStyle:"exact",
    resultTree:[ResultTree ID:isc_ResultTree_1 (dataSource: sandbox10, created by: isc_TreeGrid_0)],
    callback:{
        caller:[ResultTree ID:isc_ResultTree_1 (dataSource: sandbox10, created by: isc_TreeGrid_0)],
        methodName:"loadChildrenReply"
    },
    willHandleError:true,
    showPrompt:true,
    oldValues:{
        parentId:"2"
    },
    requestId:"sandbox10$6270",
    internalClientContext:{
        parentNode:{
            name:"2",
            id:"2",
            parentId:"0",
            isFolder:true,
            isOpen:true,
            children:Array[0]
        },
        relationship:{
            childDS:[DataSource ID:sandbox10],
            parentDS:[DataSource ID:sandbox10],
            parentIdField:"parentId",
            idField:"id"
        },
        childrenReplyCallback:{
        },
        fetchCount:1
    },
    fallbackToEval:false,
    progressiveLoading:false,
    lastClientEventThreadCode:"MUP9",
    bypassCache:true,
    dataProtocol:"getParams"
}

[Isomorphic]

We've fixed the issue for SGWT 6.0p/SC 11.0p and newer releases, and the fix will be in the nightly builds dated 2017-12-06 and beyond.

We plan to address it in SGWT 5.1p/SC 10.1p as well, but as is often the case, porting a fix back is not always a simple task. We'll update this thread when that fix is made. You may want to upgrade to a more recent release to get the quickest fixes.

[Isomorphic]

The nightlies dated 2017-12-07 should contain the fix for SGWT 5.1p/SC 10.1p.

[Isomorphic]

Note that this only affected TreeGrids with initialData provided.