class Note < ActiveRecord:: Base

    belongs_to :user

    validates :content, presence: true

    validates :user_id, presence: true

    validates :project_id, presence: true

    validates :category, presence: true

    validate :note_has_atleast_one_character

    validate :note_category_should_among_valid_values

    validate :user_exist, on: :create

    validate :project_exist, on: :create

    private 

        def note_has_atleast_one_character

            tmp = content.strip

            if tmp.length < 1

                errors[:content] = "note content should has at least one character"

            end

        end

        def note_category_should_among_valid_values

            if category != 1 and category != 2 and category !=3

                errors[:category] = "note category is not among valid values"

            end

        end

        def user_exist

            user = User.find_by(id: user_id)

            if user == nil

                errors[:user] = "user belong to Note is not exist"

            end

        end

        def project_exist

            project = Project.find_by(id: project_id)

            if project == nil

                errors[:project] = "project should be exist"

            end

        end

end