feat: Add APIs to create custom views on the dashboard (#2498)

db/migrate/20210623150613_create_custom_filters.rb

@@ -0,0 +1,12 @@
+class CreateCustomFilters < ActiveRecord::Migration[6.0]
+  def change
+    create_table :custom_filters do |t|
+      t.string :name, null: false
+      t.integer :filter_type, null: false, default: 0
+      t.jsonb :query, null: false, default: '{}'
+      t.references :account, index: true, null: false
+      t.references :user, index: true, null: false
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_06_18_095823) do
+ActiveRecord::Schema.define(version: 2021_06_23_150613) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -267,6 +267,18 @@ ActiveRecord::Schema.define(version: 2021_06_18_095823) do
     t.index ["team_id"], name: "index_conversations_on_team_id"
   end
 
+  create_table "custom_filters", force: :cascade do |t|
+    t.string "name", null: false
+    t.integer "filter_type", default: 0, null: false
+    t.jsonb "query", default: "{}", null: false
+    t.bigint "account_id", null: false
+    t.bigint "user_id", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["account_id"], name: "index_custom_filters_on_account_id"
+    t.index ["user_id"], name: "index_custom_filters_on_user_id"
+  end
+
   create_table "data_imports", force: :cascade do |t|
     t.bigint "account_id", null: false
     t.string "data_type", null: false