Gerard Kelly

Hi,

I'm having a small problem with the pagination message that displaytag is outputting for me. I'm performing pagination via the partialList method but the "displaying items X to Y" does not display correctly.

The flow is as follows:

1. user performs a search
2. query the database for the count of matching records
3. pull the correct records from the db based on the displaytag page number and number of items to be displayed at a time.
4. Set the list of items return into a dynamic struts form

However, say my query returns 15 records and we display 5 records at a time, the first page will display the message:

"15 Items found, displaying 1 to 5."

But if the user clicks onto page 2, then the same message is displayed (the row data, however, is paginated correctly).

Can anyone suggest what the problem exactly is here? PartialList is set to true on the displaytag html tag.

Thanks,
Ger.

a kishore wrote:
Hi Gerard,

I think you can pass parameter in requestURI, either for same action or for different action. Then by using that parameter you can call different method based on if-else condition is it ? If you are not sure how to pass parameter, you can pass like this:

<display:table name="someList" export="true" id="row" requestURI="MyAction.do?yourparam=yourvariable">

I hope this can help you.

regards,
kishore

Perfect! Thanks so much Kishore!

It would seems as though I can hit a new Struts action but not a new method. For example, if I first hit a method called searchAllTypes then this method is constantly being hit for pagination despite changing the RequestURI....


Any help very much appreciated.

Hi,

I'm trying to implement displaytag pagination with a little different funcitonality. Basically, I have 3 displaytag tables on my jsp, and when the user wishes to see the next set of results on one of them it brings them to a new resultant jsp which only displays the info from the table they wished to paginate.

This should be relatively simple to do. However when the user clicks a pagination link, displayTag hits the ORIGINAL struts action that it used in displaying the original data. I want to be able to hit a new struts action.

I don't think I've explained that terribly well so heres a little example.

1. User does a search.
2. A struts action called 'searchAllTypes' is hit and returns a jsp.
3. Results for 3 different types (x,y and z) are displayed in 3 seperate tables.
4. User wishes to see the next 10 results for table y so clicks 'next' on y's table.
5. A struts action called 'searchYType' is hit and returns a new jsp.

Thanks to anyone who can help me with this.

-gearoid.

Howdy.

I'm writing the value of a nested property to an outputted jsp. The date is of type Date which displays something like:

2009-10-25 18:02:05.0

But I wish to print it out in a dd/mm/yyyy format, ie. the above would become:

25/10/2009

Can anyone tell me how to do this? From what I've read on the nested taglib theres no way of doing it as easily as bean:write.

Thanks.

Hi,

I'm trying to paginate through a List of items using displaytag and Java Stripes but it doesn't seem to work correctly. Everything is working fine but when I click the link for say the 2nd page of results, it does not paginate - ie. the first 2 results are being shown again. Can anyone help?

Here is the jsp code:

<d:table name="${actionBean.results}" sort="external" id="result" requestURI="" defaultsort="1" partialList="true" pagesize="${actionBean.pagesize}" size="${actionBean.totalNumberOfResults}"> <d:column title="Title" property="title" sortable="true"/> <d:column title="Description" property="description" sortable="true"/> <d:column title="Action"> <s:link beanclass="stripesbook.action.TenderActionBean" event="view"> <s:param name="tenderId" value="${result.id}"/> View </s:link> | <s:link beanclass="stripesbook.action.TenderActionBean" event="delete" onclick="return confirm('Delete this tender?');"> <s:param name="tenderId" value="${result.id}"/> Delete </s:link> | <s:link beanclass="stripesbook.action.TenderActionBean" event="closeTender" onclick="return confirm('Are you sure you want to close this tender?');"> <s:param name="tenderId" value="${result.id}"/> Close </s:link> </d:column> </d:table>

And the corresponding TenderActionBean:

public class TenderActionBean extends TenderBaseActionBean { private static final String INDEX="/tenders/index.jsp"; private static final String LIST="/tenders/list.jsp"; private static final String VIEW="/tenders/view.jsp"; private static final String SEARCH="/tenders/search.jsp"; private static final String SEARCHRESULTS="/tenders/searchResults.jsp"; private String searchText; public String getSearchText() { return searchText; } public void setSearchText(String searchText) { this.searchText = searchText; } @DefaultHandler public Resolution list() { return new ForwardResolution(LIST); } public Resolution index() { return new ForwardResolution(INDEX); } public Resolution view() { return new ForwardResolution(VIEW); } public Resolution search() { return new ForwardResolution(SEARCH); } public Resolution delete() { tenderManager.remove(Tender.class, getTenderId()); return new RedirectResolution(getClass()); } public Resolution closeTender() { Tender t = (Tender) tenderManager.get(Tender.class, getTenderId()); t.setTenderState(TenderState.FINISHED); tenderManager.saveOrUpdate(t); return new RedirectResolution(getClass()); } public Resolution searchByTitle() { System.out.println("test"); List ts = tenderManager.findByTitle(getSearchText()); setResults(ts); this.setTotalNumberOfResults(ts.size()); //this.setPageNum(2); if ( null == this.pagesize) { this.pagesize = new Integer(Constants.PAGE_SIZE); } return new ForwardResolution(SEARCHRESULTS); } public Resolution searchByDescription() { List ts = tenderManager.findByDescription(getSearchText()); setResults(ts); return new ForwardResolution(SEARCHRESULTS); } }

The above class extends TenderBaseActionBean which holds the results set - the declaration looks like this:

protected List<Tender> results;

When I click on pagination link, the searchByTitle (or searchByDescription) action is hit and the search is performed again - is this supposed to happen? The link works correctly (ie. it appears that the second page is being displayed as Page 2 link cannot be clicked) but like I said, the results are incorrect.

Any help with this would be great guys, thanks.

Bump. Can anyone help me out with this?

Sure, here is Product.java

package com.bm.model; import java.util.Date; import java.util.Set; import javax.persistence.*; import javax.xml.bind.annotation.XmlRootElement; import org.apache.commons.lang.builder.ToStringBuilder; import org.apache.commons.lang.builder.ToStringStyle; @Entity @EntityListeners(com.bm.util.GenericEntityLogger.class) @Table(name = "product") @XmlRootElement public class Product extends BaseObject { private Long id; private String name; private String description; private Set<Category> categories; private Manufactuer manufacturer; @Id @GeneratedValue(strategy = GenerationType.AUTO) public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } // ========================================== // Relationships // ========================================== @ManyToMany( cascade = {CascadeType.REMOVE, CascadeType.PERSIST, CascadeType.MERGE}, mappedBy = "products", targetEntity = Category.class ) public Set<Category> getCategories() { return categories; } public void setCategories(Set<Category> categories) { this.categories = categories; } @ManyToOne(fetch = FetchType.EAGER) @JoinColumn(name = "manufactuer_fk") public Manufacturer getManufacturer() { return manufacturer; } public void setManufacturer(Manufacturer manufacturer) { this.manufacturer = manufacturer; } /** * {@inheritDoc} */ public boolean equals(Object o) { if (this == o) { return true; } if (!(o instanceof Product)) { return false; } final Product test = (Product) o; return !(id != null ? !id.equals(test.getId()) : test.getId() != null); } /** * {@inheritDoc} */ public int hashCode() { return (id != null ? id.hashCode() : 0); } /** * {@inheritDoc} */ public String toString() { ToStringBuilder sb = new ToStringBuilder(this, ToStringStyle.DEFAULT_STYLE).append("id", this.id).append( "name", this.name).append("description", this.description); return sb.toString(); } }


And here is productEditActionBean.java in full:
/* * Product action which holds the forwards * for the CRUD actions * */ package stripesbook.action; import net.sourceforge.stripes.action.ActionBeanContext; import net.sourceforge.stripes.action.DefaultHandler; import net.sourceforge.stripes.action.ForwardResolution; import net.sourceforge.stripes.action.RedirectResolution; import net.sourceforge.stripes.action.Resolution; import net.sourceforge.stripes.action.Wizard; import com.bm.model.Category; import com.bm.model.Manufacturer; import com.bm.model.Product; @Wizard(startEvents={"editProductPage1"}) public class ProductEditActionBean extends ProductBaseActionBean { private static final String FORM1="/products/form/edit/editForm1.jsp"; private static final String FORM2="/products/form/edit/editForm2.jsp"; private static final String FORM3="/products/form/edit/editForm3.jsp"; private static final String FORM4="/products/form/edit/editForm4.jsp"; private static final String FORM5="/products/form/edit/editForm5.jsp"; @DefaultHandler public Resolution editProductPage1() { product = (Product) productManager.get(Product.class , productId); categories = product.getCategories(); manufacturer = product.getManufacturer(); return new ForwardResolution(FORM1); } public Resolution editProductPage2() { return new ForwardResolution(FORM2); } public Resolution editProductPage3() { return new ForwardResolution(FORM3); } public Resolution editProductPage4() { return new ForwardResolution(FORM4); } public Resolution save() { Product product = assembleProduct(); if (product == null) { return new ForwardResolution(FORM1); } return new ForwardResolution(FORM4); } }

The above actionBean extends ProductBaseActionBean which looks like the following:
/*** * Excerpted from "Stripes: and Java Web Development is Fun Again", * published by The Pragmatic Bookshelf. * Copyrights apply to this code. It may not be used to create training material, * courses, books, articles, and the like. Contact us if you are in doubt. * We make no guarantees that this code is fit for any purpose. * Visit http://www.pragmaticprogrammer.com/titles/fdstr for more book information. ***/ package stripesbook.action; import java.sql.Date; import java.util.Calendar; import java.util.List; import java.util.Set; import com.bm.BMConstants; import com.bm.model.Product; import com.bm.model.Category; import com.bm.model.Manufacturer; public class ProductBaseActionBean extends BaseActionBean { ProductManager productManager = ManagerFactory.getProductManager(); public Product product; public Set<Category> categories; public Manufacturer manufacturer; public Long productId; protected List<Product> results; public Product assembleProduct() { getProduct(); getManufacturer(); productManager.createProduct(product, categories, manufacturer); return product; } public Product getProduct() { if (productId != null) { product = (Product)productManager.get(Product.class, productId); } return product; } public void setProduct(Product product) { this.product = product; } public Long getProductId() { return productId; } public void setProductId(Long productId) { this.productId = productId; } public Set<Category> getCategories() { return categories; } public void setCategories(Set<Category> categories) { this.categories = categories; } public User getManufacturer() { return manufacturer; } public void setManufacturer(Manufacturer manufacturer) { this.manufacturer = manufacturer; } public List<Product> getResults() { return results; } public void setResults(ListProduct> results) { this.results = results; } }

Thanks again for helping with this!

Hi Frederic,

thanks for that and congrats on a great book!

I'm still having a little trouble with my edit action though.

For starters, my edit action is for a model which references other objects. Although your Stripes book says "If your model objects use other model objects, that’s no problem either—Stripes happily uses deeply nested properties," I can't find an example into how this is implemented.

What I'm trying to do is the following:

public class ProductBaseActionBean extends BaseActionBean { ProductManager productManager = ManagerFactory.getProductManager(); public Product product; public Set<Category> categories; public Manufacturer manufacturer; //getters and setters go here

And then in the jsp, I'd like to do the following:

Product Name: <s:text name="product.name"/> Description: <s:textarea name="product.description"/> Manufacturer <select name="product.manufacturer.id"/> <!-- multiple select box --> Categories: <select size="5" multiple="multiple" name="product.categories.id">

The above jsp code is used for both the create and edit actions (same code, but different files if you know what I mean). However, the values for Manufacturer id or the product categories will not get passed through this way. But when I change the above code to look like this:

Manufacturer <select name="manufacturer.id"/> <!-- multiple select box --> Categories: <select size="5" multiple="multiple" name="categories.id">

They will get passed through. Unfortunately, when I go to edit my product the product name and description get populated but the other fields do not (ie. the dropdown defaults to the first option and the multi-select box does not highlight any of the previous entries.

I'd really appreciated it if you could help me out here.

Many thanks,
-ger

Hi,

I'm trying to implement what I thought would be a very simple action with the Stripes framework. I used the @Wizard annotation to perform my "Create" action and it works well but when I try to use this for the edit action (ie. pass in the ID of the object to edit), I get the following error:

"Submission of a wizard form in Stripes absolutely requires that the hidden field Stripes writes containing the names of the fields present on the form is present and encrypted (as Stripes write it). This is necessary to prevent a user from spoofing the system and getting around any security/data checks."

Does anyone know a way around this? I'd love to keep using wizard as there are a LOT of inputs in my create/edit actions and it handles a lot of the hard work ;)

Thanks in advance,
-ger

Hi,

I'm still getting used to Hibernate but am currently having a little bother with deleting an object in a many-to-many relationship.

The functionality I have between the two models is pretty basic. Lets just say the two models are Product and Category, so many products can have many categories and vice versa.

If I delete one product, I do not wish to delete the categories it references and vice versa. The two tables use an association table since its a many-to-many relationship.

I've tried several different CascadeTypes and none seem to work correctly.

Using cascadeType.MERGE produces the following error:

Cannot delete or update a parent row: a foreign key constraint fails

CascadeType.ALL deletes more than 1 row incorrectly (ie. a record in the same table if they share a common attribute)

Using NO cascadeType returns the following error:

org.hibernate.ObjectDeletedException: deleted entity passed to persist manyToMany

and CascadeType.PERSIST throws an exception also:

org.hibernate.TransientObjectException: object references an unsaved transient instance

Then if I specify the following on BOTH models:

@ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE}, mappedBy = "products")

I get an error also:

java.sql.BatchUpdateException: Cannot delete or update a parent row: a foreign key constraint fails (`lportal/ten_category_product`, CONSTRAINT `FKEF22751352CAE5BF` FOREIGN KEY (`product_fk`) REFERENCES `ten_product` (`id`))

Sorry for the long-winded explanation but if anyone could help with this, I'd more than appreciate it!

Thanks.