update(update.jsp.jet) - Generate the update page

Introduce

Generate the update page.

Related knowledge:

Task

• Configure

Model

• Model Structure

Tag

• entity
• set
• get
• for
• if
• elseif
• else

Task And Model

• Model Group: shop
• Model: book

The model group of the current task is shop, 
which contain a Java entity model book, 
and the relation value of book is one;

More about the model structure of this demo, please click: Demo model structure 

There are 2 ways to select the model:

• Select Model Group(Such as shop): <entity> tag need select the relation. This way is used in template, which require multiple models, such as many-to-one, many-to-many.

• Select Model(Such as book)(This demo): <entity> tag no need to select the relation. This way is used in template, which require only one model. Of course, you can also select relation together.

• Template: add.jsp.jet

We have created the following properties for this model:
Class: A head uppercase property, 
       which can be used as the class name or a part that need head uppercase.
       It's value is "Book".
class: A lowercase property, 
       which can be used as a part that need lowercase.
       It's value is "book".
menu: The name of the menu bar, and it's value is "Book".

• Directory: /jmr/WebContent/views/${class}

• Name: ${class}Update

• Ext: The extension is jsp

Initialization

• Entity tag set the new variable object to get the selected model.
• Set the variable menu as the title, get it by object.property("menu").
• Set the variable class as the lowercase part, get it by object.property("class").

Update field

logic:
--If the field is the query field, iterate over the field.
<table>
for field : object.fields object.isEdit
  <tr>
    --Output field name 
    <th>field.name</th>
    <td>
    --If the control is text                                    
    if field.controlType == text
    --Output input control
    <input ...>
    --If the control is select
    elseif field.controlType == select
    --Output select control
    <select ...>
      --The data of the field                    
      for data : field.datas
      --The value of the option is data.value, and the name of the option is data.name
      <option value="data.value"/>data.name</option>
    </select ...>
    --If the control is date
    elseif field.controlType == date
    --Output date control
    <input class="Wdate"...>
    </td>
  </tr>
</table>

Similar to the new page, but with more assignments

field.property("isEdit") == true: whether the field is editable, editable fields need to set control.

Result

Submit, Clear and Back

As with the new page reference.