我有一个奇怪的错误一直困扰着我一段时间。当我在本地运行服务器时，站点显示完美，但是当我尝试在我的 aws EC2 上访问它时，我收到错误“ActiveRecord::PendingMigrationError
迁移待定。要解决此问题，请运行:bin/rake db:migrate RAILS_ENV=development"
所以我运行了命令“bin/rake db:migrate RAILS_ENV=development”并打印出来。
bin/rake db:migrate RAILS_ENV=development
Running via Spring preloader in process 30908
== 20160812175638 CreatePosts: migrating ======================================
-- create_table(:posts)
-> 0.0014s
== 20160812175638 CreatePosts: migrated (0.0017s) =============================
== 20160813194710 DeviseCreateUsers: migrating ================================
-- create_table(:users)
-> 0.0015s
-- add_index(:users, :email, {:unique=>true})
-> 0.0005s
-- add_index(:users, :reset_password_token, {:unique=>true})
-> 0.0007s
== 20160813194710 DeviseCreateUsers: migrated (0.0031s) =======================
== 20160912112653 AddAttachmentImageToPosts: migrating ========================
-- change_table(:posts)
-> 0.0012s
== 20160912112653 AddAttachmentImageToPosts: migrated (0.0013s) ===============
但我仍然得到相同的消息。所以我在网上做了一些搜索，我已经阅读了关于这个问题的所有页面，但一无所获。
当我运行“rake db:migrate:status”时，我看到了这个:
Status Migration ID Migration Name
--------------------------------------------------
up 20160812175638 Create posts
up 20160813194710 Devise create users
up 20160912112653 Add attachment image to posts
当我执行“rake db:version”时，我得到了这个:
Current version: 20160912112653
“rails -v”给了我
Rails 4.2.6
并且“cat Gemfile | grep rails”给了我这个:# Bundle edge Rails 代替:
gem 'rails', github: 'rails/rails'
gem 'rails'
gem 'sass-rails', '~> 5.0'
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
# bundle exec rake doc:rails generates the API under doc/api.
# gem 'capistrano-rails', group: :development
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
我在这里不知所措，它在本地工作得很好，如果我从 database.rb 文件中编辑掉/data/，它工作得很好。
default: &default
adapter: sqlite3
pool: 5
timeout: 5000
development:
<<: *default
database: db/data/development.sqlite3
test:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/data/production.sqlite3
但是，如果我这样做，一旦我使用为我运行 docker-compose 的重新部署脚本更新站点，数据库就会被删除。
我很确定我错过了一个简单的事情，它给了我这个错误，因为该站点确实在本地主机上工作。
//猛犸象
我想我知道现在是什么问题，不知道如何解决它。
当我运行
docker volume ls它根本找不到任何音量。这是
docker inspect 的输出[
{
"Id": "4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48",
"Created": "2016-10-09T16:48:24.678289811Z",
"Path": "rails",
"Args": [
"server",
"-b",
"0.0.0.0"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 15188,
"ExitCode": 0,
"Error": "",
"StartedAt": "2016-10-09T16:48:24.925986705Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:c8ccdcb3602d581c06264db2b24f99cd4f936713ca84c614c056743b8d89d459",
"ResolvConfPath": "/var/lib/docker/containers/4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48/hostname",
"HostsPath": "/var/lib/docker/containers/4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48/hosts",
"LogPath": "/var/lib/docker/containers/4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48/4b72d9a721f086706f53f08a88b5f32c959f6a28ec37d3396c14922c7750bc48-json.log",
"Name": "/juridik_app_1",
"RestartCount": 0,
"Driver": "aufs",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": [
"/storage/db:/usr/src/app/db/data:rw"
],
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {
"3000/tcp": [
{
"HostIp": "",
"HostPort": "80"
}
]
},
"RestartPolicy": {
"Name": "always",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": [],
"CapAdd": null,
"CapDrop": null,
"Dns": null,
"DnsOptions": null,
"DnsSearch": null,
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": null,
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0
},
"GraphDriver": {
"Name": "aufs",
"Data": null
},
"Mounts": [
{
"Source": "/storage/db",
"Destination": "/usr/src/app/db/data",
"Mode": "rw",
"RW": true,
"Propagation": "rprivate"
}
],
"Config": {
"Hostname": "4b72d9a721f0",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"3000/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"S3_BUCKET_REGION=eu-europe-1",
"S3_SECRET_KEY=*************************",
"S3_BUCKET=juridik-assets",
"S3_KEY_ID=*********************",
"PATH=/usr/local/bundle/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"RUBY_MAJOR=2.3",
"RUBY_VERSION=2.3.1",
"RUBY_DOWNLOAD_SHA256=b87c738cb2032bf4920fef8e3864dc5cf8eae9d89d8d523ce0236945c5797dcd",
"RUBYGEMS_VERSION=2.6.6",
"BUNDLER_VERSION=1.13.1",
"GEM_HOME=/usr/local/bundle",
"BUNDLE_PATH=/usr/local/bundle",
"BUNDLE_BIN=/usr/local/bundle/bin",
"BUNDLE_SILENCE_ROOT_WARNING=1",
"BUNDLE_APP_CONFIG=/usr/local/bundle"
],
"Cmd": [
"rails",
"server",
"-b",
"0.0.0.0"
],
"Image": "juridik_app",
"Volumes": {
"/usr/src/app/db/data": {}
},
"WorkingDir": "/usr/src/app",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"com.docker.compose.config-hash": "6c31573cdfdba0b4c056f7af83e652b728c4a56083a6c7eabd8634b2dbfccb47",
"com.docker.compose.container-number": "1",
"com.docker.compose.oneoff": "False",
"com.docker.compose.project": "juridik",
"com.docker.compose.service": "app",
"com.docker.compose.version": "1.8.0"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "de9a9bfc8196ee65d89e09dc0a41acbb1f28830229d4e53fe057832a5419a778",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"3000/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "80"
}
]
},
"SandboxKey": "/var/run/docker/netns/de9a9bfc8196",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "ee42a322ee7de01529408d782a93556333cf9e368934ccfe03e98c1223ae44e3",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "16145185c61bbe11c565fbbb974aefaa79db796feb80eccb98765fc67bed8158",
"EndpointID": "ee42a322ee7de01529408d782a93556333cf9e368934ccfe03e98c1223ae44e3",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
}
]
最佳答案
在网上搜索了大约 3 天的答案后，我从我的 friend 那里得到了一个答案。
他告诉我摆脱“等待迁移”的大红色错误消息
我必须做
docker-compose exec app bash
在里面做
rake db:migrate
进而
exit
我做了什么，然后我的问题就消失了。所以它现在可以正常工作了。希望其他人也能从中受益。
关于sqlite - 迁移待定。要解决此问题，请在本地运行 : bin/rake db:migrate RAILS_ENV=development, 工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39904733/