How to display the logged users username in Plone using TAL

When logged in to the default Plone theme, you can see your username in the top right-hand corner (Sunburst theme).

If this is hidden you can put the following code into a template file (anywhere you like really, main_template or somewhere in portal_view_customizations) which will display the username of the user which is logged in.

<tal:block tal:condition="not: context/portal_membership/isAnonymousUser">
  (Logged in as: <span tal:replace="user/getId">(Username)</span>)
</tal:block>

Explanation:

The 'tal:condition' means this code will only show to logged in users, anonymous users see nothing at all.

Once logged in the 'tal:replace="user/getId"' puts the users' username in place of the span tag containing "(Username)" in this example.

The end result for a logged in user is (using dan, for example):

(Logged in as: dan)

Appearing somewhere on your website.

Full name

You can also display the full name of the user using the following code:

<tal:with-fullname define="membership context/portal_membership;info python:membership.getMemberInfo(user.getId()); fullname info/fullname">
    You are are <span class="name" tal:content="fullname" />
</tal:with-fullname>