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* feat: create `sqlx.toml` format * feat: add support for ignored_chars config to sqlx_core::migrate * chore: test ignored_chars with `U+FEFF` (ZWNBSP/BOM) https://en.wikipedia.org/wiki/Byte_order_mark * refactor: make `Config` always compiled simplifies usage while still making parsing optional for less generated code * refactor: add origin information to `Column` * feat(macros): implement `type_override` and `column_override` from `sqlx.toml` * refactor(sqlx.toml): make all keys kebab-case, create `macros.preferred-crates` * feat: make macros aware of `macros.preferred-crates` * feat: make `sqlx-cli` aware of `database-url-var` * feat: teach macros about `migrate.table-name`, `migrations-dir` * feat: teach macros about `migrate.ignored-chars` * chore: delete unused source file `sqlx-cli/src/migration.rs` * feat: teach `sqlx-cli` about `migrate.defaults` * feat: teach `sqlx-cli` about `migrate.migrations-dir` * feat: teach `sqlx-cli` about `migrate.table-name` * feat: introduce `migrate.create-schemas` * WIP feat: create multi-tenant database example * fix(postgres): don't fetch `ColumnOrigin` for transparently-prepared statements * feat: progress on axum-multi-tenant example * feat(config): better errors for mislabeled fields * WIP feat: filling out axum-multi-tenant example * feat: multi-tenant example No longer Axum-based because filling out the request routes would have distracted from the purpose of the example. * chore(ci): test multi-tenant example * fixup after merge * fix(ci): enable `sqlx-toml` in CLI build for examples * fix: CI, README for `multi-tenant` * fix: clippy warnings * fix: multi-tenant README * fix: sequential versioning inference for migrations * fix: migration versioning with explicit overrides * fix: only warn on ambiguous crates if the invocation relies on it * fix: remove unused imports * fix: doctest * fix: `sqlx mig add` behavior and tests * fix: restore original type-checking order * fix: deprecation warning in `tests/postgres/macros.rs` * feat: create postgres/multi-database example * fix: examples/postgres/multi-database * fix: cargo fmt * chore: add tests for config `migrate.defaults` * fix: sqlx-cli/tests/add.rs * feat(cli): add `--config` override to all relevant commands * chore: run `sqlx mig add` test with `RUST_BACKTRACE=1` * fix: properly canonicalize config path for `sqlx mig add` test * fix: get `sqlx mig add` test passing * fix(cli): test `migrate.ignored-chars`, fix bugs * feat: create `macros.preferred-crates` example * fix(examples): use workspace `sqlx` * fix: examples * fix(sqlite): unexpected feature flags in `type_checking.rs` * fix: run `cargo fmt` * fix: more example fixes * fix(ci): preferred-crates setup * fix(examples): enable default-features for workspace `sqlx` * fix(examples): issues in `preferred-crates` * chore: adjust error message for missing param type in `query!()` * doc: mention new `sqlx.toml` configuration * chore: add `CHANGELOG` entry Normally I generate these when cutting the release, but I wanted to take time to editorialize this one. * doc: fix new example titles * refactor: make `sqlx-toml` feature non-default, improve errors * refactor: eliminate panics in `Config` read path * chore: remove unused `axum` dependency from new examples * fix(config): restore fallback to default config for macros * chore(config): remove use of `once_cell` (to match `main`)
63 lines
2.5 KiB
Markdown
63 lines
2.5 KiB
Markdown
# Using Multiple Databases with `sqlx.toml`
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This example project involves three crates, each owning a different schema in one database,
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with their own set of migrations.
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* The main crate, a simple binary simulating the action of a REST API.
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* Owns the `public` schema (tables are referenced unqualified).
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* Migrations are moved to `src/migrations` using config key `migrate.migrations-dir`
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to visually separate them from the subcrate folders.
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* `accounts`: a subcrate simulating a reusable account-management crate.
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* Owns schema `accounts`.
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* `payments`: a subcrate simulating a wrapper for a payments API.
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* Owns schema `payments`.
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## Note: Schema-Qualified Names
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This example uses schema-qualified names everywhere for clarity.
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It can be tempting to change the `search_path` of the connection (MySQL, Postgres) to eliminate the need for schema
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prefixes, but this can cause some really confusing issues when names conflict.
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This example will generate a `_sqlx_migrations` table in three different schemas; if `search_path` is set
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to `public,accounts,payments` and the migrator for the main application attempts to reference the table unqualified,
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it would throw an error.
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# Setup
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This example requires running three different sets of migrations.
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Ensure `sqlx-cli` is installed with Postgres and `sqlx.toml` support:
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```
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cargo install sqlx-cli --features postgres,sqlx-toml
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```
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Start a Postgres server (shown here using Docker, `run` command also works with `podman`):
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```
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docker run -d -e POSTGRES_PASSWORD=password -p 5432:5432 --name postgres postgres:latest
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```
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Create `.env` with the various database URLs or set them in your shell environment;
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```
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DATABASE_URL=postgres://postgres:password@localhost/example-multi-database
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ACCOUNTS_DATABASE_URL=postgres://postgres:password@localhost/example-multi-database-accounts
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PAYMENTS_DATABASE_URL=postgres://postgres:password@localhost/example-multi-database-payments
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```
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Run the following commands:
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```
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(cd accounts && sqlx db setup)
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(cd payments && sqlx db setup)
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sqlx db setup
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```
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It is an open question how to make this more convenient; `sqlx-cli` could gain a `--recursive` flag that checks
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subdirectories for `sqlx.toml` files, but that would only work for crates within the same workspace. If the `accounts`
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and `payments` crates were instead crates.io dependencies, we would need Cargo's help to resolve that information.
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An issue has been opened for discussion: <https://github.com/launchbadge/sqlx/issues/3761>
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