adding some parent CRUD

app/controllers/parents_controller.rb

@@ -5,14 +5,40 @@ class ParentsController < ApplicationController
   end
 
   def show
-    @parent = Person.just_parents.where(id: params[:id])
+    @parent = Person.includes(:children).find_by_id(params[:id])
+    @more_children = Child.not_related_to(@parent.id)
   end
 
   def new
+    @parent = Person.new
+    3.times { @parent.children.build }
   end
 
   def add
-    ap params
-    redirect_to list_parents_path
+    @parent = Person.create add_parent_params
+
+    if @parent.persisted?
+      redirect_to parent_path(@parent), notice: 'Success!'
+      return
+    else
+      render :new
+    end
   end
+
+  def edit
+    @parent = Person.includes(:children).find_by_id(params[:id])
+    @more_children = Child.all
+  end
+
+  private
+
+    def add_parent_params
+      params.require(:parent).permit(
+        :first_name,
+        :last_name,
+        :phone,
+        :email,
+        children_attributes: [:first_name, :last_name]
+      )
+    end
 end

app/controllers/relationships_controller.rb

@@ -0,0 +1,19 @@
+class RelationshipsController < ApplicationController
+  def add_child
+    parent = Person.find(params[:parent])
+    child = Child.find(params[:child])
+
+    parent.parenthoods.create(child)
+
+    redirect_to :back, notice: 'Child added to parent!'
+  end
+
+  def del_child
+    parent = Person.find(params[:parent])
+    child = Child.find(params[:child])
+
+    parent.parenthoods.find_by_child_id(child.id).destroy
+
+    redirect_to :back, notice: 'Child removed from parent!'
+  end
+end