wosephjeber

Renaming table in Ecto migration

I recently wanted to rename a model and its postgres table in a Phoenix app. Renaming the table was simple and documented, but the table also had constraints, sequences, and indexes that needed to be updated in order for the Ecto model to be able to rely on default naming conventions. I couldn't find any examples of what this would look like but was eventually able to figure it out. For anyone else in the same situation, hopefully this example helps.

In the example below, I'm renaming the Permission model to Membership. This model belongs to a User and an Account, so it has foreign key constraints that need to be renamed.

defmodule MyApp.Repo.Migrations.RenamePermissionsToMemberships do
  use Ecto.Migration

yerassylad

import React, { Component } from 'react';
import styled from 'styled-components';
import { Tabs, Tab } from '@material-ui/core';

const StyledTabs = styled(props => {
  return <Tabs {...props} classes={{indicator: 'indicator'}}></Tabs>
})`
  && {
    border-bottom: 1px solid yellow;
  }

JamieMason

Group Array of JavaScript Objects by Key or Property Value

Implementation

const groupBy = key => array =>
  array.reduce((objectsByKeyValue, obj) => {
    const value = obj[key];
    objectsByKeyValue[value] = (objectsByKeyValue[value] || []).concat(obj);
    return objectsByKeyValue;

cecilemuller

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

tricoder42

GraphQL Subscription with django-channels

Django channels are official way for implementing async messaging in Django.

The primary caveat when working with GraphQL subscription is that we can't serialize message before broadcasting it to Group of subscribers. Each subscriber might use different GraphQL query so we don't know how to serialize instance in advance.

See related issue

Danilo-Araujo-Silva

For example, to override the AppBar (https://material-ui-next.com/api/app-bar/) root class we can do the following:

First method (override Material UI classnames):

1 - Add the property classes in the AppBar component:

    <AppBar classes={{root: 'my-root-class'}}

dmurawsky

const FullHeightPage = () => (
  <div>
    Hello World!
    <style global jsx>{`
      html,
      body,
      body > div:first-child,
      div#__next,
      div#__next > div {
        height: 100%;

xgqfrms-GitHub

VS code setting.json

将设置放入此文件中以覆盖默认设置

https://code.visualstudio.com/docs/languages/overview

singledigit

AWSTemplateFormatVersion: '2010-09-09'
Description: Cognito Stack
Parameters:
  AuthName:
    Type: String
    Description: Unique Auth Name for Cognito Resources

Resources:
  # Creates a role that allows Cognito to send SNS messages
  SNSRole:

nikolasburk

	Relay	Apollo
Built by	Facebook (Check out the project on GitHub)	Meteor (Check out the project on GitHub)
Frontend Technologies	Requires React / React Native and configuration of Babel plugin	Framework and platform agnostic (works with any JS framework such as React, Angular or Vue as well as on the native mobile platforms)
GraphQL API	Requires a certain structure in the GraphQL schema	Works with any GraphQL schema
Complexity	Slow learning curve: Lots of powerful magic happening behind the scenes	Low entrance barrier: Let's you get started quickly and involves more manual work for certain features
Flexibility	Almost no flexibility, strict rules how to