本文整理汇总了Python中django.db.migrations.swappable_dependency方法的典型用法代码示例。如果您正苦于以下问题：Python migrations.swappable_dependency方法的具体用法？Python migrations.swappable_dependency怎么用？Python migrations.swappable_dependency使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类django.db.migrations的用法示例。
在下文中一共展示了migrations.swappable_dependency方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: dependency
# 需要导入模块: from django.db import migrations [as 别名]
# 或者: from django.db.migrations import swappable_dependency [as 别名]
def dependency(app_label, model):
"""
Returns a Django 1.7+ style dependency tuple for inclusion in
migration.dependencies[]
"""
from django.db.migrations import swappable_dependency
return swappable_dependency(get_model_name(app_label, model)) 示例2: as_string
# 需要导入模块: from django.db import migrations [as 别名]
# 或者: from django.db.migrations import swappable_dependency [as 别名]
def as_string(self):
"""
Returns a string of the file contents.
"""
items = {
"replaces_str": "",
}
imports = set()
# Deconstruct operations
operations = []
for operation in self.migration.operations:
operation_string, operation_imports = OperationWriter(operation).serialize()
imports.update(operation_imports)
operations.append(operation_string)
items["operations"] = "\n".join(operations) + "\n" if operations else ""
# Format dependencies and write out swappable dependencies right
dependencies = []
for dependency in self.migration.dependencies:
if dependency[0] == "__setting__":
dependencies.append(" migrations.swappable_dependency(settings.%s)," % dependency[1])
imports.add("from django.conf import settings")
else:
# No need to output bytestrings for dependencies
dependency = tuple(force_text(s) for s in dependency)
dependencies.append(" %s," % self.serialize(dependency)[0])
items["dependencies"] = "\n".join(dependencies) + "\n" if dependencies else ""
# Format imports nicely, swapping imports of functions from migration files
# for comments
migration_imports = set()
for line in list(imports):
if re.match("^import (.*)\.\d+[^\s]*$", line):
migration_imports.add(line.split("import")[1].strip())
imports.remove(line)
self.needs_manual_porting = True
imports.discard("from django.db import models")
items["imports"] = "\n".join(imports) + "\n" if imports else ""
if migration_imports:
items["imports"] += (
"\n\n# Functions from the following migrations need manual "
"copying.\n# Move them and any dependencies into this file, "
"then update the\n# RunPython operations to refer to the local "
"versions:\n# %s"
) % "\n# ".join(migration_imports)
# If there's a replaces, make a string for it
if self.migration.replaces:
items['replaces_str'] = "\n replaces = %s\n" % self.serialize(self.migration.replaces)[0]
return (MIGRATION_TEMPLATE % items).encode("utf8")