Class: RailsAiContext::Tools::GetSchema

Inherits:
BaseTool
  • Object
show all
Defined in:
lib/rails_ai_context/tools/get_schema.rb

Constant Summary

Constants inherited from BaseTool

BaseTool::SESSION_CONTEXT, BaseTool::SHARED_CACHE

Class Method Summary collapse

Methods inherited from BaseTool

abstract!, abstract?, cache_key, cached_context, config, extract_method_source_from_file, extract_method_source_from_string, find_closest_match, fuzzy_find_key, inherited, not_found_response, paginate, rails_app, registered_tools, reset_all_caches!, reset_cache!, session_queries, session_record, session_reset!, set_call_params, text_response

Class Method Details

.call(table: nil, detail: "standard", limit: nil, offset: 0, format: "markdown", server_context: nil) ⇒ Object 



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# File 'lib/rails_ai_context/tools/get_schema.rb', line 45

def self.call(table: nil, detail: "standard", limit: nil, offset: 0, format: "markdown", server_context: nil)
  set_call_params(table: table, detail: detail)
  schema = cached_context[:schema]
  return text_response("Schema introspection not available. Add :schema to introspectors.") unless schema
  return text_response("Schema introspection not available: #{schema[:error]}") if schema[:error]

  tables = schema[:tables] || {}

  # Return full JSON if requested (existing behavior)
  return text_response(schema.to_json) if format == "json" && detail == "full"

  total = tables.size
  offset = [ offset.to_i, 0 ].max
  limit = [ limit.to_i, 0 ].max if limit && limit.to_i < 0

  # Single table — case-insensitive lookup with model name normalization
  # Accepts: "users", "Users", "User" (model name → pluralized+underscored table)
  if table
    table_down = table.downcase
    table_as_table = table.underscore.pluralize # Cook → cooks, BrandProfile → brand_profiles
    table_key = tables.keys.find { |k|
      k.downcase == table_down || k == table_as_table || k == table.underscore
    } || table
    table_data = tables[table_key]
    unless table_data
      return not_found_response("Table", table, tables.keys.sort,
        recovery_tool: "Call rails_get_schema(detail:\"summary\") to see all tables")
    end
    if format == "json"
      return text_response(table_data.to_json)
    end

    output = format_table_markdown(table_key, table_data)
    # Cross-reference hint for AI: suggest next tool call
    model_refs = models_for_table(table_key)
    if model_refs.any?
      output += "\n\n_Next: `rails_get_model_details(model:\"#{model_refs.first}\")` for associations, validations, scopes._"
    end
    return text_response(output)
  end

  case detail
  when "summary"
    limit ||= 50
    limit = 50 if limit.to_i < 1
    paginated = tables.keys.sort.drop(offset).first(limit)
    if paginated.empty? && total > 0
      return text_response("No tables at offset #{offset}. Total: #{total}. Use `offset:0` to start over.")
    end
    lines = [ "# Schema Summary (#{total} tables)", "" ]
    lines << "**Adapter:** #{schema[:adapter]}" if schema[:adapter]
    paginated.each do |name|
      data = tables[name]
      col_count = data[:columns]&.size || 0
      idx_count = data[:indexes]&.size || 0
      lines << "- **#{name}** — #{col_count} columns, #{idx_count} indexes"
    end
    if offset + limit < total
      lines << "" << "_Showing #{paginated.size} of #{total}. Use `offset:#{offset + limit}` for more, or `table:\"name\"` for full detail._"
      lines << "_cache_key: #{cache_key}_"
    end
    text_response(lines.join("\n"))

  when "standard"
    limit ||= 25
    limit = 25 if limit.to_i < 1
    # Sort by column count (most complex first) — AI agents care about big tables first
    sorted = tables.keys.sort_by { |name| -(tables[name][:columns]&.size || 0) }
    paginated = sorted.drop(offset).first(limit)
    if paginated.empty?
      return text_response("No tables at offset #{offset}. Total tables: #{total}. Use `offset:0` to start from the beginning.")
    end
    lines = [ "# Schema (#{total} tables, showing #{paginated.size})", "" ]
    paginated.each do |name|
      data = tables[name]
      timestamp_cols = %w[id created_at updated_at]

      # Build indexed/unique column sets for inline hints
      indexed_cols = Set.new
      unique_cols = Set.new
      (data[:indexes] || []).each do |idx|
        Array(idx[:columns]).each do |col|
          idx[:unique] ? unique_cols.add(col) : indexed_cols.add(col)
        end
      end

      # Detect encrypted columns from model data
      encrypted_cols = Set.new
      model_refs = models_for_table(name)
      models_data = cached_context[:models] || {}
      model_refs.each do |model_name|
        (models_data.dig(model_name, :encrypts) || []).each { |f| encrypted_cols.add(f) }
      end

      cols = (data[:columns] || [])
        .reject { |c| timestamp_cols.include?(c[:name]) }
        .map do |c|
          hints = []
          hints << "unique" if unique_cols.include?(c[:name])
          hints << "indexed" if indexed_cols.include?(c[:name]) && !unique_cols.include?(c[:name])
          hints << "encrypted" if encrypted_cols.include?(c[:name])
          # Show default value if present
          if c.key?(:default) && !c[:default].nil? && c[:default] != ""
            hints << "default: #{c[:default]}"
          end
          hint_str = hints.any? ? " [#{hints.join(', ')}]" : ""
          "#{c[:name]}:#{c[:type]}#{hint_str}"
        end.join(", ")
      # Inline model info so AI doesn't need a separate get_model_details call
      model_info = ""
      if model_refs.any?
        model_refs.each do |mname|
          md = models_data[mname]
          next unless md.is_a?(Hash) && !md[:error]
          assoc_count = md[:associations]&.size || 0
          val_count = md[:validations]&.size || 0
          model_info = " → **#{mname}** (#{assoc_count} assoc, #{val_count} val)"
          break
        end
      end
      lines << "### #{name}#{model_info}"
      lines << cols
      lines << ""
    end

    # Detect orphaned tables (no ActiveRecord model maps to them)
    orphaned = paginated.select { |name| models_for_table(name).empty? }
    if orphaned.any?
      lines << "\u26A0 **Orphaned tables** (no ActiveRecord model): #{orphaned.join(', ')}"
      lines << ""
    end

    lines << "_Use `detail:\"summary\"` for all #{total} tables, `detail:\"full\"` for indexes/FKs, or `table:\"name\"` for one table._" if total > limit
    text_response(lines.join("\n"))

  when "full"
    limit ||= 10
    limit = 10 if limit.to_i < 1
    paginated = tables.keys.sort.drop(offset).first(limit)
    if paginated.empty? && total > 0
      return text_response("No tables at offset #{offset}. Total: #{total}. Use `offset:0` to start over.")
    end
    lines = [ "# Schema Full Detail (#{paginated.size} of #{total} tables)", "" ]
    paginated.each do |name|
      lines << format_table_markdown(name, tables[name])
      lines << ""
    end
    if offset + limit < total
      lines << "_Showing #{paginated.size} of #{total}. Use `offset:#{offset + limit}` for more._"
      lines << "_cache_key: #{cache_key}_"
    end
    text_response(lines.join("\n"))
  else
    # Fallback to full dump (backward compat)
    text_response(format_schema_markdown(schema))
  end
end