How do I show Users that are "Pending" to join Group? - ruby-on-rails

Question

What I want to do is show the Users that are "pending" to join a Group. I have 3 models: Users, Membership, & Groups. I have enabled Users to be able to request to join a Group. When the request is made there is a attribute in the Membership model called "state" which I made the default value to be "pending". Once the Group Admin clicks accept then the User's state is changed to "active". How do I show only the Users that are in the "pending" state?
I am able to show all Users (both "pending" & "active") who request to join the Group by adding code "#members = #group.users" in the Group controller. When I wanted to show only the "pending" Users I created a method in model Group called "pending_members". This didn't work.
Currently I get an error message that says: "ActionView::MissingTemplate in Groups#show". The error message also highlights the code "<%= render #members %>". [When I use the code #members = #group.users then the webpage does show both "pending" & "active" Users]
Here are each of the Model attributes:
create_table "groups", force: :cascade do |t|
t.string "name"
end
create_table "memberships", force: :cascade do |t|
t.integer "user_id"
t.integer "group_id"
t.string "state", default: "pending"
end
create_table "users", force: :cascade do |t|
t.string "email"
t.string "first_name"
t.string "last_name"
end
Here is the code in each respective model:
class Membership < ActiveRecord::Base
belongs_to :user
belongs_to :group
end
class User < ActiveRecord::Base
has_many :memberships, dependent: :destroy
has_many :groups, through: :memberships
end
class Group < ActiveRecord::Base
has_many :memberships, dependent: :destroy
has_many :users, through: :memberships
end
Here is the code in the controller for Groups:
def show
#group = Group.find(params[:id])
#members = #group.pending_members
end
Here is the code in the model for Groups:
def pending_members
Membership.where(state: "pending")
end
Here is the code in the view for Groups/show.html.erb:
<div class="container">
<div class="row">
<%= render #members %>
</div>
</div>

Answer 1

If you want to show users in the pending state, then you pending_members method should return a collection of users. As it is it returns a collection of memberships.
You could write it like this:
def pending_members
User.includes(:memberships).where("memberships.state" => "pending)
end
then for your view to work you could put this in
<%= render partial: 'member', collection: #group.pending_members %>
Then you need to have in the app/views/groups directory the partial _member.html.erb which might look something like this:
<div id="user-<%= member.id %>">
<p>name: <%= member.first_name %> <%= member.last_name %></p>
<p>email: <%= member.email %></p>
</div>