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40fb17791e
Commit the whole ./lib/ folder which stores the Crystal dependencies. This has a few benefits: - Allows to build the project without a connection to the Internet to retrieve dependencies. - Makes the project resistant against dependency re-tags which might include malicious code.
crystal-sqlite3 
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
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
Timeis implemented asTEXTcolumn usingSQLite3::DATE_FORMATformat.Boolis implemented asINTcolumn mapping0/1values.