<AppML> Case Study - Application Model
This case study demonstrates how to build a complete <AppML> Internet application with the ability to list, edit, and search information for several tables in a database.
Application Model
In this chapter, we will build a complete application model for the Customers table in the database.
<AppML> Filters
To allow filtering of <AppML> data, simply add a <filters> element to the model:
Example:
<query>
<field label="Customer">CustomerName</field>
<field>City</field>
<field>Country</field>
</query>
<order>
<field label="Customer">CustomerName</field>
<field>City</field>
<field>Country</field>
</order>
</filters>
For a full explanation, please refer to the <AppML>Reference Manual。
<AppML> Update
To allow updating of <AppML> data, simply add an <update> element to the model:
Example:
<item><name>LastName</name></item>
<item><name>FirstName</name></item>
<item><name>BirthDate</name></item>
<item><name>Photo</name></item>
<item><name>Notes</name></item>
</update>
And add a <maintable> and a <keyfield> element to the <database> element:
Example:
<keyfield>CustomerID</keyfield>
For a full explanation, please refer to the <AppML>Reference Manual。
<AppML> Security
You can easily add security to an <AppML> model by adding a security attribute to the <AppML> tag.
Example:
In the example above, only users who log in as members of the user group "admin" can access the model.
To set security for the <update> element, simply add a security attribute to the <update> element:
Example:
<item><name>LastName</name></item>
<item><name>FirstName</name></item>
<item><name>BirthDate</name></item>
<item><name>Photo</name></item>
<item><name>Notes</name></item>
</update>
Complete Customers Model
In this chapter, we will set up an application model for each table in the database.
Create a new folder named Models. In the Models folder, create a model for each application.
Model: Customers.xml
<datasource>
<database>
<connection>Demo</connection>
<maintable>Customers</maintable>
<keyfield>CustomerID</keyfield>
<sql>SELECT * FROM Customers</sql>
<orderby>CustomerName,City,Country</orderby>
</database>
</datasource>
<filters>
<query>
<field label="Customer">CustomerName</field>
<field>City</field>
<field>Country</field>
</query>
<order>
<field label="Customer">CustomerName</field>
<field>City</field>
<field>Country</field>
</order>
</filters>
<update security="admin">
<item><name>CustomerName</name></item>
<item><name>ContactName</name></item>
<item><name>Address</name></item>
<item><name>PostalCode</name></item>
<item><name>City</name></item>
<item><name>Country</name></item>
</update>
</appml>
Model View
Create a model view, save it as Demo_Model.html, and try it out:
View: Demo_Model.htm
<div id="List01"></div>
<script src="appml.js.html"></script>
<script>
customers=new AppML("appml.htmlx","Models/Customers");
customers.run("List01");
</script>
Try it yourself »
Now Combine Everything Together
Then, with a little JavaScript coding, create a test page for all models:
Demo_Model_Views.htm
<html>
<head>
<link rel="stylesheet" href="appml.css.html" />
</head>
<body>
<h1>Demo Applications</h1>
<button onclick='myOpen("Customers")'>Customers</button>
<button onclick='myOpen("Products")'>Products</button>
<button onclick='myOpen("Suppliers")'>Suppliers</button>
<button onclick='myOpen("Shippers")'>Shippers</button>
<button onclick='myOpen("Categories")'>Categories</button>
<button onclick='myOpen("Employees")'>Employees</button>
<button onclick='myOpen("Orders")'>Orders</button>
<button onclick='myOpen("OrderDetails")'>OrderDetails</button>
<br><br>
<div id="Place01"></div>
<script src="appml.js.html"></script>
<script>
function myOpen(pname)
{
var app_obj
app_obj=new AppML("appml.php","Models/" + pname);
app_obj.run("Place01");
}
</script>
</body>
</html>
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