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List:       struts-dev
Subject:    DO NOT REPLY [Bug 26485] New:  -
From:       bugzilla () apache ! org
Date:       2004-01-28 6:29:15
Message-ID: 20040128062915.8661.qmail () nagoya ! betaversion ! org
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26485

automate maxlength validations

           Summary: automate maxlength validations
           Product: Struts
           Version: 1.1 Final
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Validator Framework
        AssignedTo: struts-dev@jakarta.apache.org
        ReportedBy: hauser@acm.org


It appears to be good practice to execute a maxlength validation for all form
fields, especially the ones eventually ending up in a database.

To save the programmer all the configuration writing chores, I suggest to
automate this in the following way:

Assume there is a registration form with the field "private String loginName;" -
if there is also
a) int loginName_maxLength = 60; //adapt value to permitted field length in DB
b) the below global "automateMaxLength" is set to "true"

then

i) always execute the "maxlength" validation rule (no need to list that in
validation.xml)
ii) always amend the '<html:text property="loginName"' in jsps using the
registration form with 'maxlength="60"' as per
http://jakarta.apache.org/struts/userGuide/struts-html.html#text
and
iii) if the below "autoOnChangeJS" is "true", amend the same '<html:text
property="loginName"' with an
'onchange="MODAL_MAX_LENGHT_AUTOGENERATED_JAVA_SCRIPT"' for those who expect
their visitors to have JavaScript enabled.

The configuration block in the struts-config.xml thus should be enhanced with
two properties:
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
  ...
  <set-property property="automateMaxLength" value="true"/>
  <set-property property="autoOnChangeJS" value="true"/>
  ...
</plug-in>

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