rails has_many through source 2
Start by defining the models involved in the association. In this case, we have three models:
User
,Team
, andMembership
.In the
User
model, use thehas_many
keyword followed by the name of the association. In this example, it would behas_many :memberships
.In the
User
model, use thehas_many through
keyword followed by the name of the association and the name of the join model. In this example, it would behas_many :teams, through: :memberships
.In the
User
model, specify the source of the association. This is necessary when the association name doesn't match the name of the target model. In this example, it would besource: :team
.In the
Team
model, use thehas_many
keyword followed by the name of the association. In this example, it would behas_many :memberships
.In the
Team
model, use thehas_many through
keyword followed by the name of the association and the name of the join model. In this example, it would behas_many :users, through: :memberships
.In the
Team
model, specify the source of the association. This is necessary when the association name doesn't match the name of the target model. In this example, it would besource: :user
.In the
Membership
model, use thebelongs_to
keyword followed by the name of the association. In this example, it would bebelongs_to :user
andbelongs_to :team
.Make sure to set up the appropriate database migrations to create the necessary tables and foreign key constraints.
You can now access the associated records using the defined associations. For example, you can retrieve all the teams a user is a member of by calling
user.teams
.Additionally, you can also access the associated records in the opposite direction. For example, you can retrieve all the users belonging to a team by calling
team.users
.