Pass records to CheckboxColumn's attrs too

fixes: #762

django_tables2/columns/checkboxcolumn.py

@@ -1,6 +1,6 @@
 from django.utils.safestring import mark_safe
 
-from django_tables2.utils import Accessor, AttributeDict
+from django_tables2.utils import Accessor, AttributeDict, computed_values
 
 from .base import Column, library
 
@@ -65,8 +65,10 @@ def render(self, value, bound_column, record):
 
         general = self.attrs.get("input")
         specific = self.attrs.get("td__input")
-        attrs = AttributeDict(default, **(specific or general or {}))
-        return mark_safe("<input %s/>" % attrs.as_html())
+
+        attrs = dict(default, **(specific or general or {}))
+        attrs = computed_values(attrs, kwargs={"record": record, "value": value})
+        return mark_safe("<input %s/>" % AttributeDict(attrs).as_html())
 
     def is_checked(self, value, record):
         """

tests/columns/test_checkboxcolumn.py

@@ -89,3 +89,17 @@ class TestTable(tables.Table):
             "value": "2",
             "name": "col",
         }
+
+    def test_column_callable_attrs(self):
+        class TestTable(tables.Table):
+            col = tables.CheckBoxColumn(
+                attrs={"input": {"data-source": lambda record: record["col"]}}
+            )
+
+        table = TestTable([{"col": "1"}])
+        assert attrs(table.rows[0].get_cell("col")) == {
+            "type": "checkbox",
+            "value": "1",
+            "name": "col",
+            "data-source": "1",
+        }