Class: RailsLens::Schema::Adapters::Sqlite3

Inherits:
Base
  • Object
show all
Defined in:
lib/rails_lens/schema/adapters/sqlite3.rb

Instance Attribute Summary

Attributes inherited from Base

#connection, #table_name

Instance Method Summary collapse

Methods inherited from Base

#generate_view_annotation, #initialize, #unqualified_table_name

Constructor Details

This class inherits a constructor from RailsLens::Schema::Adapters::Base

Instance Method Details

#adapter_name ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 7

def adapter_name
  'SQLite'
end

#fetch_view_metadata ⇒ Object

Fetch all view metadata in a single consolidated query



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 106

def fetch_view_metadata
  result = connection.exec_query(<<~SQL.squish, 'SQLite View Metadata')
    SELECT sql FROM sqlite_master
    WHERE type = 'view' AND name = '#{connection.quote_string(table_name)}'
    LIMIT 1
  SQL

  return nil if result.rows.empty?

  definition = result.rows.first&.first&.strip
  return nil unless definition

  # Parse dependencies from the SQL definition
  tables = []
  definition.scan(/(?:FROM|JOIN)\s+(\w+)/i) do |match|
    table_name_match = match[0]
    # Exclude the view itself and common SQL keywords
    if !table_name_match.downcase.in?(%w[select where order group having limit offset]) &&
       tables.exclude?(table_name_match) &&
       table_name_match != table_name
      tables << table_name_match
    end
  end

  {
    type: 'regular',  # SQLite only supports regular views
    updatable: false, # SQLite views are generally read-only
    dependencies: tables.sort
  }
rescue ActiveRecord::StatementInvalid, SQLite3::Exception => e
  RailsLens.logger.debug { "Failed to fetch view metadata for #{table_name}: #{e.message}" }
  nil
end

#generate_annotation(model_class) ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 11

def generate_annotation(model_class)
  if model_class && ModelDetector.view_exists?(model_class)
    generate_view_annotation(model_class)
  else
    generate_table_annotation(model_class)
  end
end

#generate_table_annotation(_model_class) ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 19

def generate_table_annotation(_model_class)
  lines = []
  lines << "table = \"#{table_name}\""
  lines << "database_dialect = \"#{database_dialect}\""
  lines << ''

  add_columns_toml(lines)
  add_indexes_toml(lines) if show_indexes?
  add_foreign_keys_toml(lines) if show_foreign_keys?
  add_sqlite_pragmas_toml(lines)

  lines.join("\n")
end

#view_definition ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 156

def view_definition
  result = connection.exec_query(<<~SQL.squish, 'SQLite View Definition')
    SELECT sql FROM sqlite_master
    WHERE type = 'view' AND name = '#{connection.quote_string(table_name)}'
    LIMIT 1
  SQL

  result.rows.first&.first&.strip
rescue ActiveRecord::StatementInvalid, SQLite3::Exception
  nil
end

#view_dependencies ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 151

def view_dependencies
  @view_metadata ||= fetch_view_metadata
  @view_metadata&.dig(:dependencies) || []
end

#view_last_refreshed ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 172

def view_last_refreshed
  nil # SQLite doesn't have materialized views
end

#view_refresh_strategy ⇒ Object 



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 168

def view_refresh_strategy
  nil # SQLite doesn't have materialized views
end

#view_type ⇒ Object

Legacy methods - kept for backward compatibility but now use consolidated query



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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 141

def view_type
  @view_metadata ||= fetch_view_metadata
  @view_metadata&.dig(:type)
end

#view_updatable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rails_lens/schema/adapters/sqlite3.rb', line 146

def view_updatable?
  @view_metadata ||= fetch_view_metadata
  @view_metadata&.dig(:updatable) || false
end