Class: Mechmarket::Database

Inherits:
Object
  • Object
show all
Defined in:
lib/mechmarket/database.rb

Constant Summary collapse

SCHEMA =
{
  id: 'INTEGER PRIMARY KEY AUTOINCREMENT',
  reddit_id: 'TEXT NOT NULL',
  created_utc: 'INTEGER NOT NULL',
  url: 'TEXT NOT NULL',
  author: 'TEXT NOT NULL',
  title: 'TEXT NOT NULL',
  body: 'TEXT NOT NULL',
  type: 'TEXT NOT NULL'
}.freeze

Class Method Summary collapse

Class Method Details

.databaseObject



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# File 'lib/mechmarket/database.rb', line 17

def database
  @database ||= SQLite3::Database.new(File.expand_path('../../db/mechmarket.db', __dir__))
end

.migrate(debug: false) ⇒ Object



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# File 'lib/mechmarket/database.rb', line 21

def migrate(debug: false)
  statements = []

  statements << "    CREATE TABLE IF NOT EXISTS posts(\#{SCHEMA.map { |key, value| \"\#{key} \#{value}\" }.join(', ')});\n  SQL\n\n  statements << <<~SQL\n    CREATE UNIQUE INDEX IF NOT EXISTS index_posts_on_reddit_id ON posts(reddit_id);\n  SQL\n\n  statements << <<~SQL\n    CREATE VIRTUAL TABLE IF NOT EXISTS posts_fts5 USING fts5(title, tokenize=\"porter ascii tokenchars '-_'\", content=\"posts\", content_rowid=\"id\");\n  SQL\n\n  statements << <<~SQL\n    CREATE TRIGGER IF NOT EXISTS posts_ai AFTER INSERT ON posts BEGIN\n      INSERT INTO posts_fts5(rowid, title) VALUES(new.id, new.title);\n    END;\n  SQL\n\n  statements << <<~SQL\n    CREATE TRIGGER IF NOT EXISTS posts_ad AFTER DELETE ON posts BEGIN\n      INSERT INTO posts_fts5(posts_fts5, rowid, title) VALUES('delete', old.id, old.title);\n    END;\n  SQL\n\n  statements << <<~SQL\n    CREATE TRIGGER IF NOT EXISTS posts_au AFTER UPDATE ON posts BEGIN\n      INSERT INTO posts_fts5(posts_fts5, rowid, title) VALUES('delete', old.id, old.title);\n      INSERT INTO posts_fts5(rowid, title) VALUES(new.id, new.title);\n    END;\n  SQL\n\n  statements.each do |statement|\n    database.execute(statement)\n  end\n\n  puts database.execute('SELECT * FROM sqlite_master') if debug\nrescue SQLite3::Exception => e\n  puts e.inspect\nensure\n  database&.close\nend\n"