Ticket #1108: defaultFilters.diff

core/template/defaultfilters.py

@@ -226 +226 @@
     except IndexError:
         return ''
 
+def in_(value, arg):
+    """
+    Returns True if `a` is found in list `b`. False if not found.  
+    {{ a|in:b }}
+    or
+    {{ isThisValue|in:thisListOfValues }}
+    """
+    return value in arg
+
 def join(value, arg):
     "Joins a list with a string, like Python's ``str.join(list)``"
     try:
@@ -443 +452 @@
 register.filter(fix_ampersands)
 register.filter(floatformat)
 register.filter(get_digit)
+register.filter('in', in_)
 register.filter(join)
 register.filter(length)
 register.filter(length_is)