{"id":26431,"date":"2017-02-28T11:47:35","date_gmt":"2017-02-28T11:47:35","guid":{"rendered":"https:\/\/dev.railscarma.com\/multi-tenancy-using-apartment-gem\/"},"modified":"2024-01-10T12:57:15","modified_gmt":"2024-01-10T12:57:15","slug":"flerbostad-med-lagenhetsparla","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/sv\/blogg\/tekniska-artiklar\/flerbostad-med-lagenhetsparla\/","title":{"rendered":"Multi Tenancy genom att anv\u00e4nda l\u00e4genhetsp\u00e4rla"},"content":{"rendered":"
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

L\u00e5t oss f\u00f6rst f\u00f6rst\u00e5 skillnaden mellan enstaka och flerboende
\n
\nSingel hyresr\u00e4tt<\/strong>:<\/p>\n

Varje kund har sin egen mjukvaruinstans, egen DB och den betj\u00e4nar endast en kund. H\u00e4r kan mjukvaran anpassas f\u00f6r att m\u00f6ta de specifika kundkraven d\u00e5 den \u00e4r oberoende.<\/p>\n


\nFlera hyresr\u00e4tter:<\/strong><\/p>\n

I det h\u00e4r fallet betj\u00e4nar en enda instans av programvara flera kunder. H\u00e4r kallar vi varje kund som hyresg\u00e4st. H\u00e4r kan vi \u00e4ndra UI-reglerna och aff\u00e4rsreglerna men kan inte \u00e4ndra applikationskoden eftersom samma arkitektur delas av flera kunder. Det \u00e4r ekonomiskt eftersom kostnaderna f\u00f6r mjukvaruutveckling och underh\u00e5ll delas mellan kunderna. Men uppdateringar kan endast g\u00f6ras av leverant\u00f6ren.<\/p>\n

\"singletenant-multitenant\"<\/a>
\nF\u00f6rdelar: <\/strong>
\n1. Single hardware that manages multiple customers.
\n2. Cost savings. Cost can be shared between all the customers.
\n3. Easy maintenance
\n4. Configuration can be changed without touching codebase.
\n5. New tenants can be added easily since it is a shared architecture.<\/p>\n

Nackdelar:<\/strong>
\nDB customization will be difficult to handle since it is a single DB shared between multiple customers with different tenants.<\/p>\n

There are milia, acts_as_tenant and apartment gem to handle multi-tenancy in the Rails application.<\/p>\n

L\u00e4genhet Gem:<\/strong><\/p>\n

Denna p\u00e4rla antar ett annat s\u00e4tt att hantera flera hyresr\u00e4tter. Det fungerar genom att g\u00f6ra en annan DB f\u00f6r varje hyresg\u00e4st. F\u00f6r PostgreSql skapar det ett annat schema f\u00f6r varje hyresg\u00e4st. Jag gillar det h\u00e4r tillv\u00e4gag\u00e5ngss\u00e4ttet i ljuset av att informationen verkligen \u00e4r oengagerad f\u00f6r den h\u00e4r situationen. Databasen delas inte och om du beh\u00f6ver radera en klients information beh\u00f6ver du bara sl\u00e4ppa deras databas (eller m\u00f6nster). Den st\u00f6der \u00e4ven Hissar och m\u00f6jligg\u00f6r automatisk v\u00e4xling mellan kundens hyresg\u00e4st och d\u00e4rigenom automatisera v\u00e4xlingslogiken.<\/p>\n

This gem helps us to deal with multi tenancy in Rails application.<\/p>\n

Add the line below, to your Gemfile and perform bundle install.<\/p>\n

p\u00e4rla "l\u00e4genhet"<\/code><\/pre>\n
F\u00f6r att generera l\u00e4genhetsinitieringsfil, k\u00f6r kommandot nedan:<\/p>\n
bundle exec rails generera l\u00e4genhet:installera<\/code><\/pre>\n
config.excluded_models = %w{ Tenant } <\/code><\/pre>\n
Here, we can specify the tenants which are of global scope, such as the Authentication model which is a common one for all the tenants.<\/p>\n
Here, I will be creating a Customer with subdomains, so, whenever customer logs in to the application, apartment fetches the subdomains and will query the database, based on tenant subdomain.<\/p>\n
skenor g st\u00e4llning Kundnamn:str\u00e4ng hyresg\u00e4st_dom\u00e4n:str\u00e4ng<\/code><\/pre>\n
do<\/p>\n
skenor db:migrera<\/code><\/pre>\n
Vi beh\u00f6ver skapa l\u00e4genhetshyresg\u00e4st, n\u00e4r vi v\u00e4l har skapat kunden.<\/p>\n
Apartment::Tenant.create('tenant_name') - F\u00f6r att skapa hyresg\u00e4st<\/code><\/pre>\n
Anv\u00e4nd after_create callback i din modell f\u00f6r att skapa hyresg\u00e4ster.<\/p>\n
def create_tenant Apartment::Tenant.create(tenant_domain) end<\/code><\/pre>\n
Once the above callback gets executed, all the migrations will run under that respective tenant.<\/p>\n
Switching of subdomains will be handled automatically when we request the application with subdomains. Below is the configuration line to switch the tenants based on subdomain.<\/p>\n
Rails.application.config.middleware.use 'L\u00e4genhet::Hissar::Subdom\u00e4n'<\/code><\/pre>\n
Att byta mellan hyresg\u00e4sterna<\/p>\n
L\u00e4genhet::Tenant.switch!('tenant_name')<\/code><\/pre>\n
All your ActiveRecord queries will be routed to the specific tenant when switch is called for.
\nSwitch will be in the root scope when you call with no arguments.<\/p>\n
Even tenant switch can be done based on the first subdomain but we need to set config in the initializer file. We can even exclude some subdomains here, such as the normal subdomain.<\/p>\n
config.middleware.use 'L\u00e4genhet::Hissar::FirstSubdomain'<\/code><\/pre>\n
L\u00e4genhet::Hissar::FirstSubdomain.excluded_subdomains = ['www']<\/code><\/pre>\n
We can also restrict the users not to create some domains such as www, admin. These domains will not be available for the users while they were being registered.<\/p>\n
Need to uncomment below config line in the apartment initializer file.<\/p>\n
L\u00e4genhet::Hissar::Subdomain.excluded_subdomains = ["public", "www" och "admin" ]<\/code><\/pre>\n
Vi kan ocks\u00e5 byta, baserat p\u00e5 hela v\u00e4rden. H\u00e4r m\u00e5ste vi hitta motsvarande hyresg\u00e4stnamn i hashen genom att anv\u00e4nda f\u00f6ljande konfigurationsrad. Vi m\u00e5ste l\u00e4gga till raden nedan i din ans\u00f6kan.rb<\/p>\n
config.middleware.use 'L\u00e4genhet::Hissar::HostHash', {'example.com' => 'exempel_hyresg\u00e4st'}<\/code><\/pre>\n
Sl\u00e4pp hyresg\u00e4ster:<\/strong><\/p>\n
Kommandot nedan kan anv\u00e4ndas f\u00f6r att sl\u00e4ppa hyresg\u00e4ster:<\/p>\n
L\u00e4genhet::Tenant.drop('tenant_name')<\/code><\/pre>\n
V\u00e4nligen kontrollera gems officiella resurs f\u00f6r att hitta mer dokumentation. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t
Prenumerera f\u00f6r de senaste uppdateringarna<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\t\t\t\t\t