Learn Grep, Prisma and Xstream

(This collection is still WIP)

Databases are essential for any full-stack applications, but working with them is traditionally very difficult. Prisma is here to change that. It's a powerful database toolkit that helps us think in data itself - not SQL, not classes, just the data we care about in our apps.

In this series, we will learn how to leverage the power of Prisma to automatically generate a type-safe, autocomplete-ready, and efficient query builder, all based on a simple and easy-to-read schema. We will integrate all this good stuff into a Next.js project to complete a simple social network app.

In the end, you will be able to understand how Prisma works, and confidently start using Prisma in your own project.

Prisma is an open-source database toolkit. It replaces traditional ORMs and makes database access easy with an auto-generated query builder for TypeScript & Node.js.

prisma

Build a full-stack app with Prisma

This collection explores one of the most promising and coolest releases of early 2020 - prisma v2. First part of the prisma infrastructure to exit experimental mode - prisma client is an auto-generated and type-safe query builder for Node.js & TypeScript. We will explore and learn it  in this collection!

Get started with Prisma v2. Prisma Client

CMD+F in your text editor can only get you so far! In this course, we will learn to use grep and find, two powerful command-line utilities, to search through and explore our codebase. Learn to search specific files and folders, using regular expressions to look for -- or ignore! -- particular phrases. We'll cover how to search recursively, get more context on your results, and some simple tricks to make your searches faster and more targeted.


Once you're familiar with grep and find, you'll be able to quickly answer questions such as: Do I use this function anywhere other than my tests? Where does this file get imported? Whether you're working on a new feature, reading a codebase for the first time, or refactoring existing code, grep and find can help you work faster and more effectively.

A Unix command used to search files for the occurrence of a string of characters that matches a specified pattern.

grep

Use Grep for Fast Search from the Command Line

When you have a bunch of text to sift through, standard Unix command line utilities like `grep`, `sed`, `awk`, `cut`, `sort`, and `uniq` can help extract the information you want. For example, with a git log for a project, you might want to group commits by day in order to see which days you're most productive, or find out how many commits you made last year. In this lesson, you'll learn how to combine these commands with the pipe operator to extract this data from git logs.

Analyze Git Logs with the Command Line

In this tutorial we will spin the docker container with official postgres image and access the database with `psql` to set up an easy playground for PostgreSQL relational database.


Run postgres database in docker container

In this lesson you write initial boilerplate for prisma (spoiler: it's not bigger than this summary) with typescript infrastructure.

Create new project with prisma

In this lesson you will learn how to connect your prisma to postgres db to be able to introspect it. We will also go trough the models and touch prisma naming convention.

Connect prisma to PostgreSQL database running in docker container

In this lesson you will learn how to generate type safe orm client with `prisma generate` and do first write operation using it.

Generate type safe client with prisma

In this lesson you will learn how to perform the simplest `findOne` and `findMany` read operations from postgres database using prisma client.

Perform read operations using prisma client

In this lesson you will learn how to perform the  `update`  operations on postgres table entries using prisma client.

Perform update operations using prisma client

In this lesson you will learn how to perform the `delete` operations on postgres database table entries using prisma client.

Perform delete operations with prisma client

In most of cases your database schema won't stay the same for too long - let's learn how to update the prisma client so it has access to all of the additions made to the postgress

Evolving prisma schema

Prisma makes database access easy with an auto-generated and type-safe query builder.

In this lesson, we will learn how to install all the necessary dependencies and set up Prisma for an existing npm project, with an empty PostgreSQL database running in the background. We will create our first Prisma data model in the schema, and use *Prisma Migrate* to map our data model into the database. 

Finally, we'll generate the *Prisma Client* into our `node_modules` directory, so later we can simply import and use the client tailored to our data models as a normal npm package in the project.

At the time of recording this lesson, *Prisma Migrate* is in an experimental state, so the extra flag `--experimental` is needed to perform the `save` and `up` commands.

Install and Set up Prisma for a New Project

In this lesson, we will write a code snippet which creates a new entry in the database. We will import and use the Prisma Client that we previously generated by running the command `npx prisma generate` to perform this query. 

Thanks to type-safety, we can now directly catch mismatched data field types while we are coding, drastically reducing the chance of having bugs in the code.

Tip - When in doubt, you can always use the key combination `ctrl-space` to invoke the autocomplete feature of VS Code. This is also a huge benefit made possible by Prisma's type-safety, and is super handy for exploring the Prisma Client API.

Create an entry in the database with Prisma Client

Apart from creating entries, it's also very intuitive to read, update, or delete data from the database with Prisma Client.

In this lesson, we will explore the [Prisma Client API](https://www.prisma.io/docs/reference/tools-and-interfaces/prisma-client/crud) for `findMany`, `findOne`, `updateMany`, `deleteMany` and so on.

Notice that since all these methods are tailored to the schema that we defined earlier, VS Code is aware of what is valid and is able to prompt us with helpful autocomplete options, making it much easier to explore the Prisma Client API.

Perform basic database queries (CRUD) with Prisma Client

In this lesson, we will learn how to model data relationships with Prisma Schema. 

We will be using a social network as our example, create data models such as users, posts, likes, comments, and model the relations between them. After this lesson, you should be able to model common relations like *one-to-one* (1:1), *one-to-many* (1:n), *many-to-many* (n:m) with Prisma.

At the time of recording this lesson, *Prisma Migrate* is in an experimental state, so the extra flag `--experimental` is needed to perform the `save` and `up` commands.


Work with Models and Relations with Prisma Schema

Sometimes you'll be looking for a string, but won't know which file it's in; or you'll want to find all usages of it within a directory. Learn how to use grep -r to recursively search all the files in a directory. 

Search directory contents recursively using grep

Learn how to use find to identify filenames matching specified patterns. We'll use find to identify all .jsx files in a directory, or all test files in a directory.

Use find to search for filename patterns

Learn to use git grep to only search through the tracked files in a git repo. This is especially useful when you want to exclude build artifacts or locally installed dependencies, such as webpack bundles or the node_modules directory. You'll also note that git grep is automatically colorized - we'll see how to get the same coloring effect with grep --color.

Search the contents of a git repository with git grep

By default, grep displays the file path and the line where a match is found. Learn to use the flags -A, -B, -C, and -n to get more context, and view line numbers as well as the lines surrounding a pattern match.


Show context around matches using grep

By using wildcards and glob patterns with the special characters . and *, you can create regular expressions that describe what kind of text you're looking for, instead of just plaintext strings. 

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