If you are using Grails Spring Security in your application, one killer functionality that we can easily provide is a simple user switcher Add this to your admin layout: [html] <sec:ifAllGranted roles=’ROLE_ADMIN’> <form action=’/j_spring_security_switch_user’ method=’POST’> Switch: <g:select from="${users}" optionKey="username" optionValue="displayInfo" name=’j_username’/>&nbsp;<input type=’submit’ value=’Switch’/> </form> </sec:ifAllGranted> <sec:ifSwitched> <a href=’${request.contextPath}/j_spring_security_exit_user’> Resume as <sec:switchedUserOriginalUsername/> </a> </sec:ifSwitched> [/html] In […]
Groovier way of finding index of element from Map. It can be obtained with findIndexOf Method, which accepts closure as argument. [groovy] Map map=["groovy":1,"grails":2,"index":3,"element":4] assert 3 == map.findIndexOf{it.key=="element"} assert 0 == map.findIndexOf{it.value==1} [/groovy]
In Grails app development, when using criteria queries, we often find cases for Outer joins. Lets take an example. We have two domain classes with us: [java] class Blog { String title String content static hasMany = [comments: Comment] static constraints = { } } [/java] and [java] class Comment { String text static belongsTo […]
Recently, I was stuck with a scenario where I was trying to bind a list of objects in my controller. While trying the way as suggested in the grails docs I was getting some weird IndexOutOfBoundException. Luckily I found a good solution on the grails mailing list: Thanks to mkwhit for asking this and Dana […]
Hi guys, Recently while working on a project, I needed to get the table names associated with a particular domain as I needed to perform complex join operations on a particular table. The database that my team was working on was a legacy database. The domains that were created were mapped to particular tables to […]
Hi guys, Recently on a project, I was creating a number of command objects to accept incoming parameters from a POST call from an iPhone with which I needed to sync data. I created a parent class for all command object classes to accept the common properties and created individual command object classes to accept […]
Grails Schema-export GANT script to generate DDL sql file of the grails project domains.
eg.
grails prod schema-export myProd.sql
Recently, I used bitwise Anding in my grails project. I am sharing the approach that we followed by means of an example. Suppose we have a domain class Person which can have multiple attributes like Smart, Intelligent, Talkative etc. What sort of relationship comes to our mind when we see this? I believe the obvious […]
In one of the modules that I was working on , I needed to delete the previous data from a table then load up the data into those tables again and then manipulate code through the ‘id’s’ on those tables. So this is what I was doing … [groovy] Event.executeUpdate(‘delete from Event’) EventInstance.executeUpdate(‘delete from EventInstance’) […]
