crystal-sqlite3 v0.16.0

SQLite3 bindings for Crystal
  • v0.16.0 - April 7, 2020
  • v0.15.0 - December 11, 2019
  • v0.14.0 - December 11, 2019
  • v0.13.0 - December 11, 2019
  • v0.12.0 - December 11, 2019

crystal-sqlite3 Build Status

SQLite3 bindings for Crystal.

Check crystal-db for general db driver documentation. crystal-sqlite3 driver is registered under sqlite3:// uri.

Installation

Add this to your application's shard.yml:

dependencies:
  sqlite3:
    github: crystal-lang/crystal-sqlite3

Usage

require "sqlite3"

DB.open "sqlite3://./data.db" do |db|
  db.exec "create table contacts (name text, age integer)"
  db.exec "insert into contacts values (?, ?)", "John Doe", 30

  args = [] of DB::Any
  args << "Sarah"
  args << 33
  db.exec "insert into contacts values (?, ?)", args: args

  puts "max age:"
  puts db.scalar "select max(age) from contacts" # => 33

  puts "contacts:"
  db.query "select name, age from contacts order by age desc" do |rs|
    puts "#{rs.column_name(0)} (#{rs.column_name(1)})"
    # => name (age)
    rs.each do
      puts "#{rs.read(String)} (#{rs.read(Int32)})"
      # => Sarah (33)
      # => John Doe (30)
    end
  end
end

DB::Any

  • Time is implemented as TEXT column using SQLite3::DATE_FORMAT format.
  • Bool is implemented as INT column mapping 0/1 values.
Owner
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  • 3 months ago
  • March 12, 2015
License

MIT License

Links
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Tue, 07 Jul 2020 12:53:39 GMT