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class CloneCourse < ActiveJob::Base
  def perform(course)
    ActiveRecord::Base.transaction do
      @new_course = course.dup
      @new_course.save!

      course.materials.each do |material|
        @new_material = material.dup
        @new_material.course = @new_course
        @new_material.save!

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Postgres Cheatsheet

This is a collection of the most common commands I run while administering Postgres databases. The variables shown between the open and closed tags, "<" and ">", should be replaced with a name you choose. Postgres has multiple shortcut functions, starting with a forward slash, "". Any SQL command that is not a shortcut, must end with a semicolon, ";". You can use the keyboard UP and DOWN keys to scroll the history of previous commands you've run.

Setup

installation, Ubuntu

http://www.postgresql.org/download/linux/ubuntu/ https://help.ubuntu.com/community/PostgreSQL

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# 1. Clear retry set

Sidekiq::RetrySet.new.clear

# 2. Clear scheduled jobs 

Sidekiq::ScheduledSet.new.clear

# 3. Clear 'Processed' and 'Failed' jobs

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FROM ruby:2.6.3-slim-buster
SHELL ["/bin/bash", "-c"]

ARG NGINX_VERSION=1.14.2

# Install dependencies
COPY ./ngx_Aptfile /tmp/Aptfile
RUN apt-get update -qq && DEBIAN_FRONTEND=noninteractive apt-get -yq dist-upgrade && \
    DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
    build-essential \

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package main

import (
	"context"
	"fmt"
	"os"
	"strconv"

	"github.com/go-redis/redis/v8"
)

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# Generated by Django 4.0 on 2022-01-02 17:59

from django.db import migrations, models


class Migration(migrations.Migration):

    dependencies = [
        ('rbr_srv_side', '0001_initial'),
    ]

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import requests
import os
import json
from logger import logging


class APIClient:
    def __init__(self, server_addr):
        self.server_addr = server_addr
        self.hostname = "hostname"

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# Generated by Django 4.0 on 2022-01-04 00:43

from django.db import migrations, models
import django.db.models.deletion
import django.utils.timezone


class Migration(migrations.Migration):

    dependencies = [

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<?xml version="1.0"?>
<clickhouse>
    <clickhouse_remote_servers>
        <local>
            <shard>
                <internal_replication>false</internal_replication>
                <replica>
                    <host>64.225.65.90</host>
                    <port>9000</port>
                </replica>

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# Starship default config, extracted from the source

# Configure the format of the prompt
format = """\
        $username\
        $hostname\
        $shlvl\
        $singularity\
        $kubernetes\
        $directory\