1 files changed, 164 insertions, 0 deletions
diff --git a/yocto-poky/bitbake/lib/toaster/contrib/django-aggregate-if-master/aggregate_if.py b/yocto-poky/bitbake/lib/toaster/contrib/django-aggregate-if-master/aggregate_if.py
new file mode 100644
index 000000000..d5f342717
--- /dev/null
+++ b/yocto-poky/bitbake/lib/toaster/contrib/django-aggregate-if-master/aggregate_if.py
@@ -0,0 +1,164 @@
+# coding: utf-8
+'''
+Implements conditional aggregates.
+
+This code was based on the work of others found on the internet:
+
+1. http://web.archive.org/web/20101115170804/http://www.voteruniverse.com/Members/jlantz/blog/conditional-aggregates-in-django
+2. https://code.djangoproject.com/ticket/11305
+3. https://groups.google.com/forum/?fromgroups=#!topic/django-users/cjzloTUwmS0
+4. https://groups.google.com/forum/?fromgroups=#!topic/django-users/vVprMpsAnPo
+'''
+from __future__ import unicode_literals
+from django.utils import six
+import django
+from django.db.models.aggregates import Aggregate as DjangoAggregate
+from django.db.models.sql.aggregates import Aggregate as DjangoSqlAggregate
+
+
+VERSION = django.VERSION[:2]
+
+
+class SqlAggregate(DjangoSqlAggregate):
+    conditional_template = '%(function)s(CASE WHEN %(condition)s THEN %(field)s ELSE null END)'
+
+    def __init__(self, col, source=None, is_summary=False, condition=None, **extra):
+        super(SqlAggregate, self).__init__(col, source, is_summary, **extra)
+        self.condition = condition
+
+    def relabel_aliases(self, change_map):
+        if VERSION < (1, 7):
+            super(SqlAggregate, self).relabel_aliases(change_map)
+        if self.has_condition:
+            condition_change_map = dict((k, v) for k, v in \
+                change_map.items() if k in self.condition.query.alias_map
+            )
+            self.condition.query.change_aliases(condition_change_map)
+
+    def relabeled_clone(self, change_map):
+        self.relabel_aliases(change_map)
+        return super(SqlAggregate, self).relabeled_clone(change_map)
+
+    def as_sql(self, qn, connection):
+        if self.has_condition:
+            self.sql_template = self.conditional_template
+            self.extra['condition'] = self._condition_as_sql(qn, connection)
+
+        return super(SqlAggregate, self).as_sql(qn, connection)
+
+    @property
+    def has_condition(self):
+        # Warning: bool(QuerySet) will hit the database
+        return self.condition is not None
+
+    def _condition_as_sql(self, qn, connection):
+        '''
+        Return sql for condition.
+        '''
+        def escape(value):
+            if isinstance(value, bool):
+                value = str(int(value))
+            if isinstance(value, six.string_types):
+                # Escape params used with LIKE
+                if '%' in value:
+                    value = value.replace('%', '%%')
+                # Escape single quotes
+                if "'" in value:
+                    value = value.replace("'", "''")
+                # Add single quote to text values
+                value = "'" + value + "'"
+            return value
+
+        sql, param = self.condition.query.where.as_sql(qn, connection)
+        param = map(escape, param)
+
+        return sql % tuple(param)
+
+
+class SqlSum(SqlAggregate):
+    sql_function = 'SUM'
+
+
+class SqlCount(SqlAggregate):
+    is_ordinal = True
+    sql_function = 'COUNT'
+    sql_template = '%(function)s(%(distinct)s%(field)s)'
+    conditional_template = '%(function)s(%(distinct)sCASE WHEN %(condition)s THEN %(field)s ELSE null END)'
+
+    def __init__(self, col, distinct=False, **extra):
+        super(SqlCount, self).__init__(col, distinct=distinct and 'DISTINCT ' or '', **extra)
+
+
+class SqlAvg(SqlAggregate):
+    is_computed = True
+    sql_function = 'AVG'
+
+
+class SqlMax(SqlAggregate):
+    sql_function = 'MAX'
+
+
+class SqlMin(SqlAggregate):
+    sql_function = 'MIN'
+
+
+class Aggregate(DjangoAggregate):
+    def __init__(self, lookup, only=None, **extra):
+        super(Aggregate, self).__init__(lookup, **extra)
+        self.only = only
+        self.condition = None
+
+    def _get_fields_from_Q(self, q):
+        fields = []
+        for child in q.children:
+            if hasattr(child, 'children'):
+                fields.extend(self._get_fields_from_Q(child))
+            else:
+                fields.append(child)
+        return fields
+
+    def add_to_query(self, query, alias, col, source, is_summary):
+        if self.only:
+            self.condition = query.model._default_manager.filter(self.only)
+            for child in self._get_fields_from_Q(self.only):
+                field_list = child[0].split('__')
+                # Pop off the last field if it's a query term ('gte', 'contains', 'isnull', etc.)
+                if field_list[-1] in query.query_terms:
+                    field_list.pop()
+                # setup_joins have different returns in Django 1.5 and 1.6, but the order of what we need remains.
+                result = query.setup_joins(field_list, query.model._meta, query.get_initial_alias(), None)
+                join_list = result[3]
+
+                fname = 'promote_alias_chain' if VERSION < (1, 5) else 'promote_joins'
+                args = (join_list, True) if VERSION < (1, 7) else (join_list,)
+
+                promote = getattr(query, fname)
+                promote(*args)
+
+        aggregate = self.sql_klass(col, source=source, is_summary=is_summary, condition=self.condition, **self.extra)
+        query.aggregates[alias] = aggregate
+
+
+class Sum(Aggregate):
+    name = 'Sum'
+    sql_klass = SqlSum
+
+
+class Count(Aggregate):
+    name = 'Count'
+    sql_klass = SqlCount
+
+
+class Avg(Aggregate):
+    name = 'Avg'
+    sql_klass = SqlAvg
+
+
+class Max(Aggregate):
+    name = 'Max'
+    sql_klass = SqlMax
+
+
+class Min(Aggregate):
+    name = 'Min'
+    sql_klass = SqlMin