SugarCRM 7: How to make certain fields readonly

HasUserRoleNameExpression.php

<?php
/**
 * Project: SugarCRM Logic Expression for checking User role
 * Original Dev: Antonio Musarra, January 2014
 * @2009-2014 Antonio Musarra <antonio.musarra[at]gmail.com>
 *
 * Desc: SugarCRM Logic Expression ext class
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */    
    require_once('include/Expressions/Expression/Generic/GenericExpression.php');
    require_once('modules/ACLRoles/ACLRole.php');

    /**
     * <b>hasUserRoleName(String roleName)</b><br>
     * Returns true if current user has the assigned rolename.<br/>
     * ex: <i>hasUserRoleName("CRMAdministrators")</i>
     */
    class HasUserRoleNameExpression extends GenericExpression
    {
        function evaluate()
        {
            $params = $this->getParameters();
            $roleName = $params[0]->evaluate();

            // exception handling
            if (empty($roleName))
            {
                throw new Exception("HasUserRoleName: The parameter is not empty");
            }
            
            global $current_user;
            
            $GLOBALS['log']->info("Check if $current_user->id has rolename called $roleName...");
            
            $isEnabledRole = in_array($roleName, ACLRole::getUserRoleNames($current_user->id));

            if($isEnabledRole)
            {
                $GLOBALS['log']->info("Check if $current_user->id has rolename called $roleName...[TRUE]");
                return AbstractExpression::$TRUE;   
            } else {
                $GLOBALS['log']->info("Check if $current_user->id has rolename called $roleName...[FALSE]");
                return AbstractExpression::$FALSE;
            }
        }

        /**
         * Returns the JS Equivalent of the evaluate function.
         */
        static function getJSEvaluate() {
            return <<<EOQ
                var roleName = this.getParameters();

                var user = SUGAR.App.data.createBean('Users', {id: SUGAR.App.user.id}); 
                user.fetch();

                var user_roles = user.getRelatedCollection('aclroles'); 
                user_roles.fetch({relate:true});

                function checkRole(element, index, array) {
                    console.log(element);
                    if(element.get('name') == roleName) 
                    {
                        return SUGAR.expressions.Expression.TRUE;
                    } else {
                        return SUGAR.expressions.Expression.FALSE;
                    }
                }

                user_roles.models.forEach(checkRole);
                return SUGAR.expressions.Expression.FALSE;
EOQ;
        }

        /**
         * Returns the maximum number of parameters needed.
         */
        static function getParameterCount()
        {
            return 1;
        }

        /**
         * Returns the opreation name that this Expression should be
         * called by.
         */
        static function getOperationName()
        {
            return "hasUserRoleName"; 
        }
    
        /**
         * The first parameter is a string.
         */
        static function getParameterTypes() {
            return AbstractExpression::$STRING_TYPE;
        }

        /**
         * Returns the String representation of this Expression.
         */
        function toString() {
        }
    }
?>

IsUserAdminExpression.php

<?php
/**
 * Project: SugarCRM Logic Expression for checking if user is admin
 * Original Dev: Antonio Musarra, Oct 2014
 * @2009-2014 Antonio Musarra <antonio.musarra[at]gmail.com>
 *
 * Desc: SugarCRM Logic Expression ext class
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */    
    require_once('include/Expressions/Expression/Generic/GenericExpression.php');
 
    /**
     * <b>IsUserAdmin()</b><br>
     * Returns true if current user is admin<br/>
     * ex: <i>isUserAdmin()</i>
     */
    class IsUserAdminExpression extends GenericExpression
    {
        function evaluate()
        {
            $params = $this->getParameters();
            $userId = $params[0]->evaluate();

            global $current_user;
            
            $GLOBALS['log']->info("Check if $current_user->id is admin...");

            if($current_user->is_admin)
            {
                $GLOBALS['log']->info("Check if $current_user->id is admin...[TRUE]");
                return AbstractExpression::$TRUE;   
            } else {
                $GLOBALS['log']->info("Check if $current_user->id is admin...[FALSE]");
                return AbstractExpression::$FALSE;
            }
        }

        /**
         * Returns the JS Equivalent of the evaluate function.
         */
        static function getJSEvaluate() {
            return <<<EOQ
                var userId = this.getParameters();

                var type = SUGAR.App.user.get('type'); 
                
                if(type === "admin")
                {
                    return SUGAR.expressions.Expression.TRUE;
                } else {
                    return SUGAR.expressions.Expression.FALSE;
                }
EOQ;
        }

        /**
         * Returns the maximum number of parameters needed.
         */
        static function getParameterCount()
        {
            return 1;
        }

        /**
         * Returns the opreation name that this Expression should be
         * called by.
         */
        static function getOperationName()
        {
            return "isUserAdmin"; 
        }

        /**
         * The first parameter is a string.
         */
        static function getParameterTypes() {
            return AbstractExpression::$STRING_TYPE;
        }
    
        /**
         * Returns the String representation of this Expression.
         */
        function toString() {
        }
    }
?>

name.php

$dependencies['Accounts']['name_readonly'] =    array(
    'hooks' => array("edit"),
    'trigger' => 'not(isUserAdmin(""))',
    'triggerFields' => array('name'),
    'onload' => true,
    //Actions is a list of actions to fire when the trigger is true
    'actions' => array(
        array(
            'name' => 'ReadOnly',
            //The parameters passed in will depend on the action type set in 'name'
            'params' => array(
                'target' => 'name',
                'value' => 'true',
            ),
        ),
    ),
);

hi, i want to to make one "Record" as read only after setting the status to "held" example, i want to make mettings record after setting them to "held" as read only. Can you help me with the code?

So far i made this:
`<?php

$dependencies['Meetings']['readonly_fields'] = array(
    'hooks' => array("edit"),
    'trigger' => 'equal($status,held)',
    //Optional, the trigger for the dependency. Defaults to 'true'.
    'triggerFields' => array('status'),
    'onload' => true,
    //Actions is a list of actions to fire when the trigger is true
    // You could list multiple fields here each in their own array under 'actions'
    'actions' => array(
        array(
            'status' => 'ReadOnly',
            //The parameters passed in will depend on the action type set in 'name'
            'params' => array(
                'target' => 'status',
                'value' => 'true',
            ),
        ),
    ),
);`