Conditional logic inside a django template {% with tag -

Conditional logic inside a django template {% with tag -

i trying within django template.

{% url="http://"|add:siteprefix|add:".com/post/?fromquoteemail=1&utm_source=c1&utm_medium=email{% if emaileventid %}&emaileventid={{ emaileventid }}{% endif %}{% if loginkeyobj %}&loginkey={{ loginkeyobj.keyword }}{% endif %}" %}

i not sure how conditional:

{% if emaileventid %}&emaileventid={{ emaileventid }}{% endif %}{% if loginkeyobj %}&loginkey={{ loginkeyobj.keyword }}{% endif %}

to play nice {%with tag

thanks help!

django django-templates