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The data that CFQUERY requests from the database comes back in a result set, and the Name attribute tells ColdFusion what that result set is to be named. The SQL statement consists of three clauses: SELECT, FROM, and ORDER BY. SELECT tells the database which columns to retrieve from the database; FROM tells the database which table to retrieve those columns from; and ORDER BY tells the database how to sort the results. The result set returned from CFQUERY contains multiple rows of data, and each row has multiple columns. It would appear that the CFOUTPUT in CompanyList.cfm evaluates variables as the CFOUTPUT in Finished.cfm did. The CFOUTPUT in CompanyList.cfm, however, has a Query attribute, which tells ColdFusion to execute everything between <cfoutput> and </cfoutput> once for each row in the result set, so you end up with one HTML table row for every row in the result set. Now that you can add and list companies, you need to the capability to modify them as well. The edit process is much like the add process, with some additional code. Before the user can edit a company record, he needs to retrieve it from the database and load it into a form. In this application, the user chooses a company to edit by entering its CompanyID into one form, submitting it, and editing it in a second form. Create a file named CompanyGetEditForm.cfm inside the Ch02 directory, type the code into the file’s editing window, and save the file.
<html> <head> <title>ColdFusion MX Bible</title> <link rel=”stylesheet” href=”styles.css”> </head> <body> <h1>Edit a Company</h1> <table> <cfform action=”CompanyEditForm.cfm” method=”POST”> <tr> <td>Company ID</td> <td> <cfinput type=”Text” name=”CompanyID” message=”Please enter the Company ID” validate=”integer” required=”Yes” size=”22” maxlength=”20”> </td> </tr> <tr> <td> </td> <td> <input type=”submit” value=”Get Company”> </td> </tr> </cfform> </table> </body> </html>
The CFFORM has a single CFINPUT for entering the ID of the company that you want to edit. This form submits its data to the next form that you’re going to build, which is where you’ll edit the company. The company edit form is much like the company add form, but the edit form must first retrieve the company record from the database and place that data into the form fields. Create a file named CompanyEditForm.cfm inside the Ch02 directory, type the code into the file’s editing window, and save the file.
<cfquery name=”GetCompany” datasource=”#Request.MainDSN#”> SELECT CompanyName, Address, City, State, ZipCode, Comments FROM Company WHERE CompanyID = #Val(CompanyID)# </cfquery> <html> <head> <title>ColdFusion MX Bible</title> <link rel=”stylesheet” href=”styles.css”> </head> <body> <h1>Edit a Company</h1> <table> <cfform action=”CompanyEditAction.cfm” method=”POST”> <cfoutput> <input type=”hidden” name=”CompanyID” value=”#Val(CompanyID)#”> </cfoutput> <tr> <td>Company Name</td> <td> <cfinput type=”Text” name=”CompanyName” value=”#GetCompany.CompanyName#” message=”Please enter a name for this company.” required=”Yes” size=”40” maxlength=”40”> </td> </tr> <tr> <td>Address</td> <td> <cfinput type=”Text” name=”Address” value=”#GetCompany.Address#” message=”Please enter this new Company’s Address.”
required=”Yes” size=”32” maxlength=”30”> </td> </tr> <tr> <td>City</td> <td> <cfinput type=”Text” name=”City” value=”#GetCompany.City#” message=”Please enter a city.” required=”Yes” size=”22” maxlength=”20”> </td> </tr> <tr> <td>State</td> <td> <cfinput type=”Text” name=”State” value=”#GetCompany.State#” message=”Please enter a state.” required=”Yes” size=”3” maxlength=”2”> </td> </tr> <tr> <td>ZIP Code</td> <td> <cfinput type=”Text” name=”ZipCode” value=”#GetCompany.ZipCode#” message=”Please enter a valid ZIP Code.” validate=”zipcode” required=”Yes” size=”11” maxlength=”10”> </td> </tr> <tr> <td>Comments</td> <td> <textarea cols=”40” rows=”5” name=”Comments”><cfoutput>#GetCompany.Comments#</cfoutput></textarea> </td> </tr> <tr> <td> </td> <td>
<input type=”submit” value=”Update Database”> </td> </tr> </cfform> </table> </body> </html>
The edit form retrieves the company record and populates the form fields with the current data.
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