diesel-rs/diesel

★ 14,065RustAudience · developerComplexity · 3/5Setup · moderate

Mindmap

mindmap
  root((diesel))
    What it does
      Type-safe queries
      Compile-time checks
      Auto row mapping
    Databases
      PostgreSQL
      MySQL
      SQLite
    Features
      Query builder
      Raw SQL support
      Code generation
    Getting started
      Cargo dependency
      Diesel CLI
      Migrations

mindmap root((diesel)) What it does Type-safe queries Compile-time checks Auto row mapping Databases PostgreSQL MySQL SQLite Features Query builder Raw SQL support Code generation Getting started Cargo dependency Diesel CLI Migrations

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Things people build with this

USE CASE 1

Build a Rust web app that reads and writes user data to a PostgreSQL database without writing raw SQL strings.

USE CASE 2

Catch database column typos and type mismatches at compile time before your program ever runs.

USE CASE 3

Auto-generate Rust structs that map to database tables to eliminate repetitive boilerplate code.

USE CASE 4

Write complex filtered and sorted queries using Rust syntax instead of raw SQL strings.

Tech stack

RustPostgreSQLMySQLSQLite

Getting it running

Difficulty · moderate Time to first run · 30min

Requires a running database and the diesel_cli tool installed separately via cargo install.

License terms were not described in the explanation.

In plain English

Diesel is a library for Rust programs that need to read and write data to a database. It works with PostgreSQL, MySQL, and SQLite. The core idea is that Diesel handles the translation between your Rust data structures and the database rows automatically, so you do not have to write that conversion code yourself every time. One of the main things Diesel is known for is catching database errors before your program ever runs. Because it uses Rust's type system, many mistakes that would normally only surface at runtime, like referencing a column that does not exist or passing the wrong kind of value, get flagged during compilation instead. This can save a lot of debugging time. The query builder lets you write database queries using Rust syntax rather than raw SQL strings. Simple operations like loading all rows from a table, filtering by a condition, or inserting new records look like ordinary Rust code. For complex queries with subqueries, ordering, and date filtering, the builder chains together cleanly and generates the correct SQL behind the scenes. If you need to write raw SQL directly, Diesel provides a way to do that too, with support for binding parameters safely. A code generation tool handles the repetitive parts. When you define a struct that maps to a database table, Diesel can automatically generate the code needed to read rows into that struct or insert the struct's values into the table. Without it, you would have to write that mapping code by hand for every field in every table. Diesel is available as a Rust package, configured by adding it to your project's dependency file and specifying which database you are using. The project has documentation, a getting-started guide on its website, and a GitHub Discussions forum where contributors and users ask questions and share projects.

Copy-paste prompts

Prompt 1

Set up Diesel in a new Rust project targeting PostgreSQL: show me the Cargo.toml changes, diesel.toml config, and how to run the first migration.

Prompt 2

Write a Diesel query that loads all users from a users table where active = true, ordered by created_at descending.

Prompt 3

Using Diesel derive macros, create the Queryable and Insertable structs for a products table with id, name, price, and created_at columns.

Prompt 4

How do I execute a raw SQL query in Diesel with bound parameters to avoid SQL injection?

Prompt 5

Walk me through a Diesel migration that adds a nullable bio text column to an existing users table.

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