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17ba19c7ae
* Splits the existing script into multiple classes * Adds command for generating IntermediateDB schema (`migrations/bin/cli schema generate`) * Changes the syntax of the IntermediateDB schema config * Adds validation for the schema config * It uses YAML schema aka JSON schema to validate the config file * It generates the SQL schema file and Ruby classes for storing data in the IntermediateDB
105 lines
2.9 KiB
Ruby
105 lines
2.9 KiB
Ruby
# frozen_string_literal: true
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module Migrations::Database::Schema
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class TableWriter
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def initialize(output_stream)
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@output = output_stream
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end
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def output_file_header(header)
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@output.puts header.gsub(/^/, "-- ")
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@output.puts
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end
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def output_table(table)
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output_create_table_statement(table)
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output_columns(table)
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output_primary_key(table)
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output_indexes(table)
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@output.puts ""
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end
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private
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def output_create_table_statement(table)
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@output.puts "CREATE TABLE #{escape_identifier(table.name)}"
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@output.puts "("
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end
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def output_columns(table)
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column_definitions = create_column_definitions(table)
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@output.puts column_definitions.join(",\n")
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end
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def output_primary_key(table)
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if table.primary_key_column_names.size > 1
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pk_definition =
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table.primary_key_column_names.map { |name| escape_identifier(name) }.join(", ")
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@output.puts " PRIMARY KEY (#{pk_definition})"
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end
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@output.puts ");"
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end
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def create_column_definitions(table)
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columns = table.sorted_columns
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has_composite_primary_key = table.primary_key_column_names.size > 1
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max_column_name_length = columns.map { |c| escape_identifier(c.name).length }.max
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max_datatype_length = columns.map { |c| convert_datatype(c.datatype).length }.max
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columns.map do |c|
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definition = [
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escape_identifier(c.name).ljust(max_column_name_length),
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convert_datatype(c.datatype).ljust(max_datatype_length),
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]
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if c.is_primary_key && !has_composite_primary_key
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definition << "NOT NULL" if c.datatype != :integer
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definition << "PRIMARY KEY"
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else
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definition << "NOT NULL" unless c.nullable
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end
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definition = definition.join(" ")
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definition.strip!
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" #{definition}"
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end
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end
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def convert_datatype(type)
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case type
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when :blob, :boolean, :date, :datetime, :float, :integer, :numeric, :text
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type.to_s.upcase
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when :inet
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"INET_TEXT"
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when :json
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"JSON_TEXT"
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else
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raise "Unknown datatype: #{type}"
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end
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end
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def escape_identifier(identifier)
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::Migrations::Database::Schema.escape_identifier(identifier)
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end
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def output_indexes(table)
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return unless table.indexes
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table.indexes.each do |index|
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index_name = escape_identifier(index.name)
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table_name = escape_identifier(table.name)
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column_names = index.column_names.map { |name| escape_identifier(name) }
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@output.puts ""
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@output.print "CREATE "
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@output.print "UNIQUE " if index.unique
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@output.print "INDEX #{index_name} ON #{table_name} (#{column_names.join(", ")})"
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@output.print " #{index.condition}" if index.condition.present?
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@output.puts ";"
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end
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end
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end
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end
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