How to initialize record from session variable in rails so that we need not to execute query for initializing a record?

Is there any way to initialize a record from session. for e.g I have a organization object and I put this in session object like

session[:organization] = organization

Now I made a custom method current_organization (I know about devise) like

def current_organization
 Organization.new(session[:organization])
end

This will return organization object. My organization belongs_to a team a devise model and team has_many :organizations but when I call

current_team.organizations.includes?(current_organization)

in view. It is returning false even if it is included in team's organizations but doing this

current_team.organizations.reload.includes?(current_organization)

is returning true. I set the session variable with organization object before calling view where i am using above method. Is there any thing which I missed like I am not able to figure out the reason for not returning true even it is included?