Ruby on rails one to many association -

i new rails. have 1 many association. table1 few fields. 1 field title location, 1 title ccode. table2 how ever has 2 fields, first field location, , 2nd ccode. table hold location. in table1 when create object assign ccode , want corresponding location ccode table2. table2 has_many table1 , table1 belongs_to table2. want display location in index view in <table> tag. think view code looks example had found , understand html enough. problem getting table2 object returns nil.

here model table1 looks like.

class table1 < activerecord::base     belongs_to :table_2      require 'csv'      def self.import(file)         csv.foreach(file.path, headers: true, row_sep: :auto, col_sep: "\t") |row|             table1.create! row.to_hash         end     end end 

here model table2 looks like.

class table2 < activerecord::base     self.table_name = 'table_2'     self.primary_key = 'ccode'     has_many :table1 end 

here table1controller looks like

class financialscontroller < applicationcontroller      def index         @financials = financial.all     end      def create         @financial_loc_ccode = financiallocccode.create(location_code: params[:location_cd], ccode: @financials.ccode)     end end 

i not have table2 controller, done in table1 controller, assume because when started project there table created table2.

like said before new rails , still learning connections between models , controllers, , how manipulate data , has has displaying in html.

any appreciated.

i'll focus on table2 being nil.

it's nil because you're not creating it.

go terminal , type rails g controller table2 create

open file , inside of empty create method create new table2 object.

you can many ways, important thing remember when have associations need define association when you're creating it.

i'll give example:

let's have user model

user model

class user < activerecord::base has_many :posts  end 

now let's have post model , want user able create many posts.

post model

class post < activerecord::base belongs_to :user  end 

now important part utilize table2 controller

when create new post, has belongs_to user, therefor this

post controller

class postscontroller < applicationcontroller    def create     #store object has many posts variable     @user = current_user      #the important part, when create post need     @post = @user.posts.create(post_params)   end  end 

whats happening here is, rails creating new post under ownership of @user. how establish relationship association.

i hope helped clear relationships little bit, if not here docs might too.

http://guides.rubyonrails.org/association_basics.html