add lineup entry (analogous to positioning)

teamsnap/forms.py

@@ -0,0 +1,21 @@
+from django import forms
+from .models import LineupEntry
+from events.models import Event
+from players.models import Player
+from django.forms import modelformset_factory, inlineformset_factory, BaseModelFormSet,formset_factory
+from crispy_forms.helper import FormHelper, Layout
+
+class LineupEntryForm(forms.ModelForm):
+    availability = None
+    class Meta:
+        model = LineupEntry
+        widgets = {
+            'label': forms.Select(attrs={'class': 'form-control form-control-sm'})
+        }
+        exclude = ()
+
+LineupEntryFormSet = modelformset_factory(
+    model=LineupEntry,
+    form=LineupEntryForm,
+    extra=0
+)