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First you need to define your fields using Django fields.

from django imports forms
from django_dynamic_filter import Field

class MyField(Field):
    class Meta:
        field = forms.CharField() # the Django field to use for the exposed form
        name = 'relation__field' # optional - if missing the name related to the filter class'll be used
        operator = 'icontains' # optional

Now you can define your dynamic filter

from django_dynamic_filter import DynamicFilter

class Myfilter(DynamicFilter):
    myfield = MyField()
    class Meta:
        model = MyModel

Then use it in your view

def myview(request):
    filter = MyFilter(request) # just pass it the request instance
    objects = filter.render_query()
    # you also can pass addtional argument to your filter
    # filter.render_query(pk__lts=42)
    ....

To render the exposed form in your template, you just have to call {{ filter.form }}