无法在 Rails 中执行查询：调用 fork() 时可能已在另一个线程中进行查询

Question

我在 macOS Catalina 版本 10.15.1 下运行当我在项目上运行 Rails 控制台并尝试执行如下查询时User.first：

objc[57093]：调用 fork() 时，+[__NSCFConstantString 初始化] 可能已在另一个线程中进行。objc[57093]：调用 fork() 时，+[__NSCFConstantString 初始化] 可能已在另一个线程中进行。我们不能在 fork() 子进程中安全地调用它或忽略它。反而崩溃了。在 objc_initializeAfterForkError 上设置断点进行调试。

我按照这个答案添加OBJC_DISABLE_INITIALIZE_FORK_SAFETY到我的.zshrc文件中，如下所示：

ZSH=$HOME/.oh-my-zsh

# You can change the theme with another one:
#   https://github.com/robbyrussell/oh-my-zsh/wiki/themes
ZSH_THEME="robbyrussell"

# Useful oh-my-zsh plugins for Le Wagon bootcamps
plugins=(git gitfast zsh-autosuggestions last-working-dir zsh-syntax-highlighting common-aliases history-substring-search)

# Prevent Homebrew from reporting - https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Analytics.md
export HOMEBREW_NO_ANALYTICS=1

# Actually load Oh-My-Zsh
source "${ZSH}/oh-my-zsh.sh"
unalias rm # No interactive rm by default (brought by plugins/common-aliases)


export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES

# Load rbenv if installed (To manage your Ruby versions)
export PATH="${HOME}/.rbenv/bin:${PATH}"
type -a rbenv > /dev/null && eval "$(rbenv init -)"

# Load nvm if installed (To manage your Node versions)
export NVM_DIR="$HOME/.nvm"
[ -s "/usr/local/opt/nvm/nvm.sh" ] && . "/usr/local/opt/nvm/nvm.sh"

# Anaconda binaries (python, pip, conda, jupyter, pytest, pylint etc.)
export PATH="/anaconda3/bin:${HOME}/anaconda3/bin:${PATH}"



# Rails and Ruby uses the local `bin` folder to store binstubs.
# So instead of running `bin/rails` like the doc says, just run `rails`
# Same for `./node_modules/.bin` and nodejs
export PATH="./bin:./node_modules/.bin:${PATH}:/usr/local/sbin"

# Store your own aliases in the ~/.aliases file and load the here.
[[ -f "$HOME/.aliases" ]] && source "$HOME/.aliases"

# Encoding stuff for the terminal
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
export EDITOR=atom

当我在终端中运行时，echo $OBJC_DISABLE_INITIALIZE_FORK_SAFETY我得到“是”，所以我认为环境变量已正确设置......但这并不能解决问题。

我该如何解决这个问题？

Answer 1

export DISABLE_SPRING=true对我有用的是在启动 Rails 控制台或服务器之前禁用 Spring：