Class: Nquery::CsvImporter

Inherits:
Object
  • Object
show all
Defined in:
lib/nquery/csv_importer.rb

Defined Under Namespace

Classes: Error

Instance Method Summary collapse

Constructor Details

#initialize(file:, name:, creator:, column_mapping: {}) ⇒ CsvImporter

Returns a new instance of CsvImporter.



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# File 'lib/nquery/csv_importer.rb', line 9

def initialize(file:, name:, creator:, column_mapping: {})
  @file = file
  @name = name.presence || "Import #{Time.current.to_fs(:short)}"
  @creator = creator
  @column_mapping = column_mapping
end

Instance Method Details

#import ⇒ Object 



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# File 'lib/nquery/csv_importer.rb', line 16

def import
  raise Error, "No file provided" unless @file

  upload = CsvUpload.create!(
    name: @name,
    creator: @creator,
    status: "processing",
    column_mapping: @column_mapping
  )

  rows = CSV.read(@file.path, headers: true)
  table_name = "nquery_import_#{upload.id}"

  connection = ActiveRecord::Base.connection
  columns = infer_columns(rows.headers)
  create_import_table(connection, table_name, columns)
  insert_rows(connection, table_name, rows, columns)

  data_source = DataSource.create!(
    name: @name,
    adapter: connection.adapter_name.downcase.include?("postgres") ? "postgresql" : "rails",
    connection_config: { import_table: table_name }.to_json
  )

  upload.update!(status: "completed", column_mapping: columns)
  upload
rescue StandardError => e
  upload&.update!(status: "failed")
  raise Error, e.message
end