simulating has and belongs to many (HABTM)
i just want to make sure that i am thinking about this the seaside/smalltalk way.. i would like to build a 'has and belongs to many' relation where i can drill down on my data from either side. say i have a movie, and a theater. a movie can be shown in many theaters, and a theater can show many movies. i would want to be able to ask a theater what movies it's showing, or a movie which theaters it is showing in. my initial thought would be to create a 'showing' model, where it would have a movie and a theater attached.. then i could query showing for either movie or theater.. or, i could have a theaters Collection on movies and a movies Collection on on theaters, and contain that information in only two models.. any suggestions? thanks! -- ---- peace, sergio photographer, journalist, visionary http://www.ThoseOptimizeGuys.com http://www.CodingForHire.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101
On Sep 27, 2012, at 8:29 PM, sergio_101 wrote:
i just want to make sure that i am thinking about this the seaside/smalltalk way..
i would like to build a 'has and belongs to many' relation where i can drill down on my data from either side.
say i have a movie, and a theater. a movie can be shown in many theaters, and a theater can show many movies.
i would want to be able to ask a theater what movies it's showing, or a movie which theaters it is showing in.
my initial thought would be to create a 'showing' model, where it would have a movie and a theater attached.. then i could query showing for either movie or theater..
I would say that it depend is the showing is an important part of your domain. Else you can either have dictionaries or collections on both movie and theater.
or, i could have a theaters Collection on movies and a movies Collection on on theaters, and contain that information in only two models..
any suggestions?
thanks!
-- ---- peace, sergio photographer, journalist, visionary
http://www.ThoseOptimizeGuys.com http://www.CodingForHire.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101
I would say that it depend is the showing is an important part of your domain. Else you can either have dictionaries or collections on both movie and theater.
so, either way, i am not breaking any best practices? -- ---- peace, sergio photographer, journalist, visionary http://www.ThoseOptimizeGuys.com http://www.CodingForHire.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101
sergio_101 wrote
I would say that it depend is the showing is an important part of your domain. Else you can either have dictionaries or collections on both movie and theater.
so, either way, i am not breaking any best practices?
A Theather will probably have many MovieShow's, which will have in which room it will be shown, the showtime, and the actual movie title, which may be the same but with variants (translated, subtitled, 3D, imax, or those combined), you could also reify the combinations based on language, subtitles (lang, or none), etc. And this is an overly simplified analysis of a domain I barely know. Magritte provides descriptions for these relations, and will create editors based on such relations. I don't know if there is any Magritte-Glorp integration to manage that. Regards! -- Esteban -- View this message in context: http://forum.world.st/simulating-has-and-belongs-to-many-HABTM-tp4649319p464... Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
participants (3)
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Esteban A. Maringolo -
sergio_101 -
Stéphane Ducasse