Use find to list the current folder:

find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'

Add to ~/.bash_profile or ~/.zshrc
alias tree="find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'"
　　

Or install the tree with brew
brew install tree

I installed the ansible via pip install, and there are several issues here:

where is the config

Here you should create a file ~/.ansible.cfg

[defaults]
inventory =~/.ansible/hosts
sudo_user=root
remote_port=22
host_key_checking=False
remote_user=root
log_path=~/.ansible/log/ansible.log
module_name=command
private_key_file=~/.ssh/id_rsa

To reverse all migrations for an app, you can run:

python manage.py migrate my_app zero

To remove directories, run
git clean -f -d or git clean -fd

To remove ignored files, run
git clean -f -X or git clean -fX

To remove ignored and non-ignored files, run
git clean -f -x or git clean -fx

pip install -e /path/to/package

ysql> SET foreign_key_checks = 0;
mysql> drop table photologue_gallery;
mysql> drop table photologue_photo;
mysql> SET foreign_key_checks = 1;

Check what's the CONSTRAINT name and the FOREIGN KEY name:

SHOW CREATE TABLE table_name;

Remove both the CONSTRAINT name and the FOREIGN KEY name:

ALTER TABLE table_name
  DROP FOREIGN KEY the_name_after_CONSTRAINT,
  DROP KEY the_name_after_FOREIGN_KEY;

Or simply run this if you know the foreign key name:

alter table footable drop foreign key fooconstraint

原文：https://stackoverflow.com/questions/838354/mysql-removing-some-foreign-keys

Issues:

I want to recreate the migrations, so I deleted files under migrations folder, and drop the database. And try this python manage.py makemigrations, it reponse No changes detected.

Fix:

Create the database again, and clear files and folders under migrations, then try the following:

1. python manage.py makemigrations --empty appname
2. python manage.py makemigrations
3. python manage.py migrate

It works!

Background

mysql server was installed by brew install mysql

Issues like this:

ERROR: Failed building wheel for mysqlclient

ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'clang' failed with exit status 1

Exception: Wrong MySQL configuration: maybe https://bugs.mysql.com/bug.php?id=86971 ?

自从华为被ARM和Android"封锁令"一系列负面消息来袭之后，关于华为的鸿蒙系统新闻层出不穷。
另据国家知识产权局商标查询显示，华为今年5月份和6月份申请了商标名称为"鸿蒙"的多个类目商标。这个时间前后也有许多公司和个人开始抢注"鸿蒙"为关键字的不同类目的商标。
其实按照以往的营销策略，一开始大V如华为高管在微博散布消息，之后开始让媒体热炒，再加上用户的跟风等一系列炒作之后，基本上就可以看到具体上线时间了。不过对于研发一款多平台支持的OS来说并不是易事。