我想从Django迁移中的特定Postgresql模式（即“ schema1”）中创建新表。
尽管遵循this blog或this post的方法1，迁移仍将表发送到默认模式“ public”而不是“ schema1”。
在+ aws_instance.zookeeper[0]
id: ami: "ami-09693313102a30b2c"
arn:
associate_public_ip_address: "false"
availability_zone:
cpu_core_count:
cpu_threads_per_core:
credit_specification.#: "1"
credit_specification.0.cpu_credits: "unlimited"
disable_api_termination: "true"
ebs_block_device.#:
ebs_optimized: "false"
ephemeral_block_device.#:
get_password_data: "false"
host_id:
iam_instance_profile: "devl-ZOOKEEPER_IAM_PROFILE"
instance_state:
instance_type: "t3.small"
ipv6_address_count: ipv6_addresses.#:
key_name: "devl-key"
monitoring: "false"
network_interface.#:
network_interface_id:
password_data:
placement_group:
primary_network_interface_id:
private_dns: private_ip: public_dns:
public_ip:
root_block_device.#: "1"
root_block_device.0.delete_on_termination: "true"
root_block_device.0.volume_id:
root_block_device.0.volume_size: "16"
root_block_device.0.volume_type: "gp2"
security_groups.#:
source_dest_check: "false"
subnet_id: "subnet-5b8d8200"
tags.%: "3"
tags.Description: "Do not terminate more than one at a time"
tags.Env: "devl"
tags.Name: "devl-zookeeper-0"
tenancy:
user_data: "70fd2ae9f7da42e2fb15328cd6539c4f7ed4a5be"
volume_tags.%:
vpc_security_group_ids.#: "1"
vpc_security_group_ids.3423986071: "sg-03911aa28dbcb3f20"
-/+ aws_lb_target_group_attachment.SchemaRegistryTgAttach[0] (new
resource required)
id: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034-20190218210336558900000001" => (forces new resource)
port: "8081" => "8081"
target_group_arn: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034" => "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034" target_id: "i-03ed28ab175c0f684" => "${element(aws_volume_attachment.kafka_att.*.instance_id,count.index)}" (forces new resource)
-/+ aws_lb_target_group_attachment.SchemaRegistryTgAttach[1] (new resource required) id: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034-20190218210336576900000002" => (forces new resource)
port: "8081" => "8081"
target_group_arn: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034" => "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034"
target_id: "i-0b39bd7244f32809f" => "${element(aws_volume_attachment.kafka_att.*.instance_id,count.index)}" (forces new resource)
-/+ aws_lb_target_group_attachment.SchemaRegistryTgAttach[2] (new resource required)
id: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034-20190218210336671000000003" => (forces new resource)
port: "8081" => "8081"
target_group_arn: "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034" => "arn:aws:elasticloadbalancing:eu-west-1:544611607123:targetgroup/devl-KafkaSchemaRegistryTG/46193714a87ea034"
target_id: "i-0bbd8d3a10890b94c" => "${element(aws_volume_attachment.kafka_att.*.instance_id,count.index)}" (forces new resource)
+ aws_volume_attachment.kafka_att[0]
id:
device_name: "/dev/sdh"
instance_id: "${element(aws_instance.zookeeper.*.id,count.index)}"
volume_id: "vol-021d1530117f31905"
中，我有：
settings.py在DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'OPTIONS': {
'options': '-c search_path=django,public'
},
'NAME': 'myDB',
'USER': 'username',
'PASSWORD': '***',
'HOST': 'my.host.address',
'PORT': '1234',
},
'schema1': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'OPTIONS': {
'options': '-c search_path=schema1,public'
},
'NAME': 'myDB',
'USER': 'username',
'PASSWORD': '***',
'HOST': 'my.host.address',
'PORT': '1234',
}
}
#Path to DBrouter to handle PG schemas https://stackoverflow.com/a/51007441/3976696
DATABASE_ROUTERS = ('djangogirls.dbrouters.MyDBRouter',)
中，我有：
djangogirls/dbrouters.py还有我要迁移的模型类，位于from legacydbapp.models import MyUser
# Include here any class (i.e. table) that belongs to the schema "schema1"
ROUTED_MODELS_SCHEMA1 = [MyUser]
class MyDBRouter(object):
"""
A router to place DB queries into correct schema depending on considered tables.
"""
def db_for_read(self, model, **hints):
if model in ROUTED_MODELS_SCHEMA1 :
return 'schema1'
return None
def db_for_write(self, model, **hints):
if model in ROUTED_MODELS_SCHEMA1 :
return 'schema1'
return None
：
models.py我运行了以下命令：
class MyUser(models.Model):
first_name = models.CharField(max_length=30, default='',null=True, blank=True)
last_name = models.CharField(max_length=30, default='', null=True, blank=True)
profession = models.CharField(max_length=32,default='', null=True, blank=True)
def __str__(self):
return self.first_name + " " + self.last_name
class Meta:
managed = True
db_table = 'myuser'
然后sqlmigrate返回以下SQL：
$ python manage.py makemigrations legacydbapp
$ python manage.py sqlmigrate legacydbapp 0001_initial
$ python manage.py migrate legacydbapp
如果DB路由器正在工作，我希望SQL改为读取BEGIN;
--
-- Create model MyUser
--
CREATE TABLE "myuser" (
"id" serial NOT NULL PRIMARY KEY,
"first_name" varchar(30) NULL,
"last_name" varchar(30) NULL,
"profession" varchar(32) NULL);
COMMIT;
，但事实并非如此。我是不是在某个地方搞砸了，还是在Django 2.1.5中根本无法实现？
答案 0 :(得分：1)
运行迁移时，必须显式提供数据库定义的名称：
$ python manage.py migrate legacydbapp --database schema1
为确保仅在特定数据库中创建模型MyUser，您的路由器必须实现.allow_migrate()