{"id":19044,"date":"2015-04-17T16:05:12","date_gmt":"2015-04-17T10:35:12","guid":{"rendered":"https:\/\/2thenew.today\/blog\/?p=19044"},"modified":"2015-04-17T16:05:12","modified_gmt":"2015-04-17T10:35:12","slug":"making-a-domain-non-persistent","status":"publish","type":"post","link":"https:\/\/2thenew.today\/blog\/making-a-domain-non-persistent\/","title":{"rendered":"Making a domain non-persistent"},"content":{"rendered":"

In grails app, there might come scenarios where one need to create a non-persistent domain rather than creating a command obejct or POJO \/ POGO.<\/p>\n

GORM comes with a handy static property mapWith which has default value GORM (which associates any domain with gorm persistence layer).
\nTo make a domain non persistent set mapWith=”none”. For example, see Ticket domain below<\/p>\n

[code lang=”groovy”]
\npublic class Ticket {
\n String id
\n List<Long> productInstanceId
\n static hasMany = [productInstanceId:Long]
\n static mapWith = "none"
\n}
\n[\/code]<\/p>\n

Advantages:-<\/p>\n

    \n
  1. Still behaves like a GORM Domain in most of the cases like Ticket domain above is still accessible by GrailsDomainClass<\/li>\n
  2. When using multiple database , still respects the convention over configuration policy.<\/li>\n
  3. supports scaffolding while same can’t be done for command objects. <\/li>\n<\/ol>\n
    \n

    Also, at some point of time to check on a particular domain that what type of mapping it has, fetch the static property with domain class. For the domain above, it would be <\/p>\n

    [code lang=”groovy”]
    \nTicket.mapWith
    \n[\/code]<\/p>\n

    or<\/p>\n

    [code lang=”groovy”]
    \nTicket.class.mapWith
    \n[\/code]<\/p>\n

    If doing a dynamic check then can find it with the help of DefaultGrailsDomainClass.<\/p>\n

    [code lang=”groovy”]
    \nGrailsDomainClass domainClass = new DefaultGrailsDomainClass(Ticket.class)
    \ndomainClass.mappingStrategy
    \n[\/code]<\/p>\n","protected":false},"excerpt":{"rendered":"

    In grails app, there might come scenarios where one need to create a non-persistent domain rather than creating a command obejct or POJO \/ POGO. GORM comes with a handy static property mapWith which has default value GORM (which associates any domain with gorm persistence layer). To make a domain non persistent set mapWith=”none”. For […]<\/p>\n","protected":false},"author":119,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":6,"footnotes":""},"categories":[7],"tags":[29,4840,1757,1758],"class_list":["post-19044","post","type-post","status-publish","format-standard","hentry","category-grails","tag-gorm","tag-grails","tag-mapwith","tag-non-persistent-domain"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t