ruby - In Rails, how do I print out a user.name from an Active Record left join table -


i have users , albums tables. foreign key albums table user_id.

my active record query is:

def show   @album = album.find(params[:id])   @added_by = user.joins('left outer join albums on albums.id = (params[:id])') end

in erb have:

<%= added_by.name %>

my schema is:

activerecord::schema.define(version: 20150930203820)    # these extensions must enabled in order support database   enable_extension "plpgsql"    create_table "albums", force: :cascade |t|     t.string   "artist",     null: false     t.integer  "year"     t.string   "title",      null: false     t.string   "pressing"     t.string   "format"     t.string   "label"     t.string   "genre"     t.text     "image_url"     t.string   "tracklist"     t.string   "country"     t.text     "comment"     t.boolean  "favorite"     t.datetime "created_at", null: false     t.datetime "updated_at", null: false     t.integer  "user_id"   end    add_index "albums", ["user_id"], name: "index_albums_on_user_id", using: :btree    create_table "users", force: :cascade |t|     t.string   "email",                      null: false     t.string   "pic_url"     t.string   "name",                       null: false     t.string   "favorite"     t.string   "crypted_password"     t.string   "salt"     t.datetime "created_at"     t.datetime "updated_at"     t.datetime "last_login_at"     t.datetime "last_logout_at"     t.datetime "last_activity_at"     t.string   "last_login_from_ip_address"   end    add_index "users", ["last_logout_at", "last_activity_at"], name: "index_users_on_last_logout_at_and_last_activity_at", using: :btree   add_index "users", ["name", "email"], name: "index_users_on_name_and_email", unique: true, using: :btree    add_foreign_key "albums", "users" end

simply try:

@album.user.name

if work make sure have set active record associations in models like:

# user.rb class user < activerecord::base   has_many :albums end # album.rb class album < activerecord::base   belongs_to :user end

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