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    #1

    DataSource.get() problem

    Hello!

    SmartGWT EE 3.0, Chrome 21.0 and IE 9.

    I am trying to test the upload of a file to a database, but I am stuck in a NullPointerException, when trying to get the datasource from a ds.xml file.

    fileUpload.ds.xml
    Code:
    <DataSource ID="fileUpload" serverType="sql" tableName="GWTTESTS">  
    <fields>  
        <field name="FILE_VERSION" type="text"/>  
        <field name="FILE_BLOB" type="binary"/>  
    </fields>  
</DataSource>
    GWTTests.html
    Code:
    <!doctype html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title></title>
<script>
var isomorphicDir = "gwttests/sc/";
</script>
<script type="text/javascript" language="javascript"
	src="gwttests/gwttests.nocache.js"></script>
</head>
<body>
<script SRC="sc/DataSourceLoader?dataSource=fileUpload"</script> 
</body>
</html>
    GWTTests.java
    Code:
    package local.tests.client;

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.data.DSRequest;
import com.smartgwt.client.data.DSResponse;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.ButtonItem;
import com.smartgwt.client.widgets.form.fields.FileItem;
import com.smartgwt.client.widgets.form.fields.TextItem;
import com.smartgwt.client.widgets.layout.HLayout;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class GWTTests implements EntryPoint {

    /**
     * This is the entry point method.
     */
    public void onModuleLoad() {

    	DataSource dataSource = DataSource.get("fileUpload");  

        final DynamicForm uploadForm = new DynamicForm();  
        uploadForm.setDataSource(dataSource);  
        uploadForm.setWidth(300);  
          
        TextItem versionItem = new TextItem("FILE_VERSION");  
  
        FileItem fileItem = new FileItem("FILE_BLOB");  
          
        ButtonItem saveItem = new ButtonItem("save", "SAVE");  
        saveItem.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() {  
            public void onClick(com.smartgwt.client.widgets.form.fields.events.ClickEvent event) {  
                uploadForm.saveData(new com.smartgwt.client.data.DSCallback() {  
                    public void execute(DSResponse response, Object data, DSRequest request) {  
                        uploadForm.editNewRecord();  
                    }  
                });  
            }  
        });  
  
        uploadForm.setFields(versionItem, fileItem, saveItem);
        
        HLayout topLayout = new HLayout();  
        topLayout.setMembers(uploadForm);  
          
        topLayout.draw(); 

    }
}
    The datasource is parsed successfuly, as can be seen in console.txt. But it's returning nullPointerException when trying to set to the form (dev-console.txt).
    Attached Files
    Tags: None
    #2
    See the FAQ for comprehensive troubleshooting instructions for any issue loading DataSources.

    Comment

      #3
      I've already check the list under "(SGWT Pro or better) I can't load my DataSource, DataSource.get() returns null", and as far as I see, I've got all the things in the right place.
      Is there any thing else that I should check?
      The xml is parsed, but when I call the uploadForm.setDataSource(dataSource), the dataSource is null.

      Comment

        #4
        You have a typo in your <script> tag:

        Code:
        <script SRC="sc/DataSourceLoader?dataSource=fileUpload"</script>
        No closing ">".

        Comment

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