Class: StructuredDataToSql::MysqlDumpXml::TableStructure

Inherits:
Object
  • Object
show all
Defined in:
lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ TableStructure

Returns a new instance of TableStructure.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 10

def initialize(name)
  @name = name
  @columns = []
  @primary_keys = []
  @indexes = {}
  @unique_keys = {}
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 8

def columns
  @columns
end

#indexes ⇒ Object (readonly)

Returns the value of attribute indexes.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 8

def indexes
  @indexes
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 8

def name
  @name
end

#primary_keys ⇒ Object (readonly)

Returns the value of attribute primary_keys.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 8

def primary_keys
  @primary_keys
end

#unique_keys ⇒ Object (readonly)

Returns the value of attribute unique_keys.



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 8

def unique_keys
  @unique_keys
end

Instance Method Details

#add_column(attrs) ⇒ Object 



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 18

def add_column(attrs)
  col = {
    name: attrs["Field"].to_s,
    type: attrs["Type"] || "text",
    null: attrs["Null"] == "YES",
    key: attrs["Key"].to_s,
    default: attrs["Default"],
    extra: attrs["Extra"].to_s
  }
  @columns << col
  case col[:key]
  when "PRI"
    @primary_keys << col[:name]
  when "UNI"
    @unique_keys["uk_#{col[:name]}"] = [col[:name]]
  when "MUL"
    @indexes["idx_#{col[:name]}"] = [col[:name]]
  end
end

#column_names ⇒ Object 



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 38

def column_names
  @columns.map { |col| col[:name] }
end

#to_create_table_sql ⇒ Object 



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# File 'lib/structured_data_to_sql/mysql_dump_xml/table_structure.rb', line 42

def to_create_table_sql
  lines =
    @columns.map do |col|
      definition =
        "  #{SqlText.escape_identifier(col[:name])} #{col[:type]}"
      definition += " NOT NULL" unless col[:null]
      if col[:default] && col[:default] != "null"
        default = col[:default]
        definition +=
          if default.start_with?("CURRENT_") || default == "NULL" ||
               numeric_type?(col[:type])
            " DEFAULT #{default}"
          else
            " DEFAULT #{SqlText.escape_sql_string(default)}"
          end
      elsif col[:null] && col[:default] == "null"
        definition += " DEFAULT NULL"
      end
      if col[:extra].downcase.include?("auto_increment")
        definition += " AUTO_INCREMENT"
      elsif col[:extra].downcase.include?(
            "on update current_timestamp"
          ) || col[:extra].include?("DEFAULT_GENERATED")
        definition +=
          " ON UPDATE CURRENT_TIMESTAMP" unless definition.upcase.include?(
          "ON UPDATE CURRENT_TIMESTAMP"
        )
      end
      definition
    end

  if @primary_keys.any?
    lines << "  PRIMARY KEY (#{@primary_keys.map { |key| SqlText.escape_identifier(key) }.join(", ")})"
  end
  @unique_keys.each do |name, cols|
    lines << "  UNIQUE KEY #{SqlText.escape_identifier(name)} (#{cols.map { |col| SqlText.escape_identifier(col) }.join(", ")})"
  end
  @indexes.each do |name, cols|
    lines << "  KEY #{SqlText.escape_identifier(name)} (#{cols.map { |col| SqlText.escape_identifier(col) }.join(", ")})"
  end

  "DROP TABLE IF EXISTS #{SqlText.escape_identifier(@name)};\n" \
    "CREATE TABLE #{SqlText.escape_identifier(@name)} (\n" \
    "#{lines.join(",\n")}\n" \
    ") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;\n"
end