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112 lines
2.4 KiB
Markdown
112 lines
2.4 KiB
Markdown
---
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id: developer_guide
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title: Developer guide
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---
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## PostgreSQL
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To run and develop unleash, you need to have PostgreSQL database (PostgreSQL v10.x or newer) locally.
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> Unleash currently also work with PostgreSQL v9.5+, but this might change in a future feature relase, and we have stopped runnig automatic integration tests below PostgreSQL v10.
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### Create a local unleash databases in postgres
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```bash
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$ psql postgres <<SQL
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CREATE USER unleash_user WITH PASSWORD 'passord';
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CREATE DATABASE unleash;
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GRANT ALL PRIVILEGES ON DATABASE unleash to unleash_user;
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CREATE DATABASE unleash_test;
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GRANT ALL PRIVILEGES ON DATABASE unleash_test to unleash_user;
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SQL
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```
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> Password is intentionally set to 'passord', which is the Norwegian word for password.
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Then set env vars:
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(Optional as unleash will assume these as default values).
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```
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export DATABASE_URL=postgres://unleash_user:passord@localhost:5432/unleash
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export TEST_DATABASE_URL=postgres://unleash_user:passord@localhost:5432/unleash_test
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```
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## PostgreSQL with docker
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If you don't want to install PostgreSQL locally, you can spin up an Docker instance. We have created a script to ease this process: `scripts/docker-postgres.sh`
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## Commands
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```
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// Install dependencies
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npm install
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// Start server in development
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npm start:dev
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// Unleash UI
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http://localhost:4242
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// API:
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http://localhost:4242/api/
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// Execute tests in all packages:
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npm test
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```
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## Database changes
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We use database migrations to track database changes.
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### Making a schema change
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To run migrations, you will set the environment variable for DATABASE_URL
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`export DATABASE_URL=postgres://unleash_user:passord@localhost:5432/unleash`
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Use db-migrate to create new migrations file.
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```bash
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> npm run db-migrate -- create YOUR-MIGRATION-NAME
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```
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All migrations require one `up` and one `down` method.
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Example of a typical migration:
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```js
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/* eslint camelcase: "off" */
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'use strict';
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exports.up = function(db, cb) {
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db.createTable(
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'examples',
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{
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id: { type: 'int', primaryKey: true, notNull: true },
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created_at: { type: 'timestamp', defaultValue: 'now()' },
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},
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cb,
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);
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};
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exports.down = function(db, cb) {
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return db.dropTable('examples', cb);
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};
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```
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Test your migrations:
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```bash
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> npm run db-migrate -- up
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> npm run db-migrate -- down
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```
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## Publishing / Releasing new packages
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Please run `npm run nsp` and `npm run test` checks before publishing.
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Run `npm run publish` to start the publishing process.
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`npm run publish:dry`
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