parent
1495c78656
commit
07806c6942
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package post |
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import ( |
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"database/sql" |
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"fmt" |
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"path" |
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"github.com/mediocregopher/blog.mediocregopher.com/srv/cfg" |
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migrate "github.com/rubenv/sql-migrate" |
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) |
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var migrations = []*migrate.Migration{ |
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&migrate.Migration{ |
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Id: "1", |
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Up: []string{ |
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`CREATE TABLE posts ( |
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id TEXT NOT NULL PRIMARY KEY, |
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title TEXT NOT NULL, |
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description TEXT NOT NULL, |
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series TEXT, |
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published_at INTEGER NOT NULL, |
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last_updated_at INTEGER, |
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body TEXT NOT NULL |
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)`, |
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`CREATE TABLE post_tags ( |
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post_id TEXT NOT NULL, |
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tag TEXT NOT NULL, |
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UNIQUE(post_id, tag) |
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)`, |
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}, |
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Down: []string{ |
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"DROP TABLE post_tags", |
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"DROP TABLE posts", |
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}, |
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}, |
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} |
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// SQLDB is a sqlite3 database which can be used by storage interfaces within
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// this package.
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type SQLDB struct { |
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db *sql.DB |
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} |
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// NewSQLDB initializes and returns a new sqlite3 database for post storage
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// intefaces. The db will be created within the given data directory.
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func NewSQLDB(dataDir cfg.DataDir) (*SQLDB, error) { |
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path := path.Join(dataDir.Path, "post.sqlite3") |
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db, err := sql.Open("sqlite3", path) |
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if err != nil { |
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return nil, fmt.Errorf("opening sqlite file at %q: %w", path, err) |
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} |
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migrations := &migrate.MemoryMigrationSource{Migrations: migrations} |
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if _, err := migrate.Exec(db, "sqlite3", migrations, migrate.Up); err != nil { |
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return nil, fmt.Errorf("running migrations: %w", err) |
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} |
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return &SQLDB{db}, nil |
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} |
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// Close cleans up loose resources being held by the db.
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func (db *SQLDB) Close() error { |
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return db.db.Close() |
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} |
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