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Code Issues 32 Releases Wiki Activity

Refs #24366 -- Renamed arguments in MigrationGraph, renamed tests

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This commit is contained in:
Marten Kenbeek
2015-02-23 14:29:28 +01:00
committed by Markus Holtermann
parent c7ec3c07e7
commit bc83add04c
2 changed files with 14 additions and 12 deletions
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22
django/db/migrations/graph.py
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@@ -126,33 +126,35 @@ class MigrationGraph(object):
self.node_map[node].__dict__.pop('_descendants', None)
self.cached = False
def forwards_plan(self, node):
def forwards_plan(self, target):
"""
Given a node, returns a list of which previous nodes (dependencies)
must be applied, ending with the node itself.
This is the list you would follow if applying the migrations to
a database.
"""
if node not in self.nodes:
raise NodeNotFoundError("Node %r not a valid node" % (node, ), node)
if target not in self.nodes:
raise NodeNotFoundError("Node %r not a valid node" % (target, ), target)
# Use parent.key instead of parent to speed up the frequent hashing in ensure_not_cyclic
self.ensure_not_cyclic(node, lambda x: (parent.key for parent in self.node_map[x].parents))
self.ensure_not_cyclic(target, lambda x: (parent.key for parent in self.node_map[x].parents))
self.cached = True
return self.node_map[node].ancestors()
node = self.node_map[target]
return node.ancestors()
def backwards_plan(self, node):
def backwards_plan(self, target):
"""
Given a node, returns a list of which dependent nodes (dependencies)
must be unapplied, ending with the node itself.
This is the list you would follow if removing the migrations from
a database.
"""
if node not in self.nodes:
raise NodeNotFoundError("Node %r not a valid node" % (node, ), node)
if target not in self.nodes:
raise NodeNotFoundError("Node %r not a valid node" % (target, ), target)
# Use child.key instead of child to speed up the frequent hashing in ensure_not_cyclic
self.ensure_not_cyclic(node, lambda x: (child.key for child in self.node_map[x].children))
self.ensure_not_cyclic(target, lambda x: (child.key for child in self.node_map[x].children))
self.cached = True
return self.node_map[node].descendants()
node = self.node_map[target]
return node.descendants()
def root_nodes(self, app=None):
"""