Module: Tapsoob::Schema

Extended by:
Schema
Included in:
Schema
Defined in:
lib/tapsoob/schema.rb

Constant Summary collapse

NON_INTEGER_PK_PATTERN = 
/^(\s*)primary_key\s+(:?\w+),\s*:type=>"([^"]+)"(.*)$/
INTEGER_DB_TYPES = 
/\A(?:int(?:eger|\d+)?|bigint|smallint|serial|bigserial|smallserial)/i

Instance Method Summary collapse

Instance Method Details

#dump(database_url, options = {}) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 13

def dump(database_url, options = {})
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    template = ERB.new <<-END_MIG
Class.new(Sequel::Migration) do
  def up
  <% db.send(:sort_dumped_tables, db.tables, {}).each do |table| %>
<%= db.dump_table_schema(table, options) %>
  <% end %>
  end

  def down
  <% db.send(:sort_dumped_tables, db.tables, {}).reverse.each do |table| %>
drop_table("<%= table %>", if_exists: true, cascade: true)
  <% end %>
  end
end
END_MIG

    template.result(binding)
  end
end

#dump_table(database_url_or_db, table, options) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 36

def dump_table(database_url_or_db, table, options)
  table = table.to_sym
  # Accept either a database URL or an existing connection object
  if database_url_or_db.is_a?(Sequel::Database)
    db = database_url_or_db
    db.extension :schema_dumper
    <<END_MIG
Class.new(Sequel::Migration) do
  def up
#{db.dump_table_schema(table, options)}
  end

  def down
drop_table("#{table}", if_exists: true)
  end
end
END_MIG
  else
    Sequel.connect(database_url_or_db) do |db|
      db.extension :schema_dumper
      <<END_MIG
Class.new(Sequel::Migration) do
  def up
#{db.dump_table_schema(table, options)}
  end

  def down
drop_table("#{table}", if_exists: true)
  end
end
END_MIG
    end
  end
end

#foreign_keys(database_url) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 71

def foreign_keys(database_url)
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    db.dump_foreign_key_migration
  end
end

#indexes(database_url) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 78

def indexes(database_url)
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    db.dump_indexes_migration
  end
end

#indexes_individual(database_url) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 85

def indexes_individual(database_url)
  idxs = {}
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper

    tables = db.tables
    tables.each do |table|
      idxs[table] = db.send(:dump_table_indexes, table, :add_index, {}).split("\n")
    end
  end

  idxs.each do |table, indexes|
    idxs[table] = indexes.map do |idx|
      <<END_MIG
Class.new(Sequel::Migration) do
  def up
#{idx}
  end
end
END_MIG
    end
  end
  JSON.generate(idxs)
end

#load(database_url_or_db, schema, options = { drop: false }) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 110

def load(database_url_or_db, schema, options = { drop: false })
  schema = rewrite_non_integer_primary_keys(schema)
  # Accept either a database URL or an existing connection object
  if database_url_or_db.is_a?(Sequel::Database)
    db = database_url_or_db
    db.extension :schema_dumper
    klass = eval(schema)
    if options[:drop]
      # Start special hack for MySQL
      db.run("SET foreign_key_checks = 0") if [:mysql, :mysql2].include?(db.adapter_scheme)
      db.run("PRAGMA foreign_keys = OFF") if db.adapter_scheme == :sqlite

      # Run down migration
      klass.apply(db, :down)

      # End special hack for MySQL
      db.run("SET foreign_key_checks = 1") if [:mysql, :mysql2].include?(db.adapter_scheme)
      db.run("PRAGMA foreign_keys = ON") if db.adapter_scheme == :sqlite
    end
    klass.apply(db, :up)
  else
    Sequel.connect(database_url_or_db) do |db|
      db.extension :schema_dumper
      klass = eval(schema)
      if options[:drop]
        # Start special hack for MySQL
        db.run("SET foreign_key_checks = 0") if [:mysql, :mysql2].include?(db.adapter_scheme)
        db.run("PRAGMA foreign_keys = OFF") if db.adapter_scheme == :sqlite

        # Run down migration
        klass.apply(db, :down)

        # End special hack for MySQL
        db.run("SET foreign_key_checks = 1") if [:mysql, :mysql2].include?(db.adapter_scheme)
        db.run("PRAGMA foreign_keys = ON") if db.adapter_scheme == :sqlite
      end
      klass.apply(db, :up)
    end
  end
end

#load_foreign_keys(database_url, foreign_keys) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 151

def load_foreign_keys(database_url, foreign_keys)
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    eval(foreign_keys).apply(db, :up)
  end
end

#load_indexes(database_url, indexes) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 158

def load_indexes(database_url, indexes)
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    eval(indexes).apply(db, :up)
  end
end

#reset_db_sequences(database_url) ⇒ Object 



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# File 'lib/tapsoob/schema.rb', line 184

def reset_db_sequences(database_url)
  Sequel.connect(database_url) do |db|
    db.extension :schema_dumper
    next unless db.respond_to?(:reset_primary_key_sequence)
    db.tables.each do |table|
      pk = db.primary_key(table)
      next unless pk
      pk_type = db.schema(table).find { |col, _| col.to_s == pk.to_s }&.last&.dig(:db_type)
      next unless pk_type&.match?(/int|serial/i)
      db.reset_primary_key_sequence(table)
    rescue Sequel::DatabaseError => e
      Tapsoob.log.warn "Could not reset sequence for table '#{table}': #{e.message.lines.first.chomp}"
    end
  end
end

#rewrite_non_integer_primary_keys(schema_str) ⇒ Object

On PG 10+, Sequel’s CreateTableGenerator injects ‘identity: true` into every primary_key call via serial_primary_key_options. PG rejects IDENTITY on non-integer types. Rewrite `primary_key :col, :type=>“varchar…”` to `column :col, “varchar…”, primary_key: true, null: false` which bypasses that code path entirely.



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# File 'lib/tapsoob/schema.rb', line 173

def rewrite_non_integer_primary_keys(schema_str)
  schema_str.gsub(NON_INTEGER_PK_PATTERN) do
    indent, col, db_type, rest = $1, $2, $3, $4
    if db_type =~ INTEGER_DB_TYPES
      "#{indent}primary_key #{col}, :type=>\"#{db_type}\"#{rest}"
    else
      "#{indent}column #{col}, \"#{db_type}\", primary_key: true, null: false#{rest}"
    end
  end
end