I created an invoice using xml api with a rails (ruby) app.

@models.execute_kw(@db, @uid, @password, "account.invoice", "create", {

  partner_id: any_customer_id,

  date_due: Time.now.strftime("%Y-%m-%d"),

  date: Time.now.strftime("%Y-%m-%d"),

  date_invoice: Time.now.strftime("%Y-%m-%d"),

  amount_untaxed: 15.0,

  amount_untaxed_signed: 15.0,

  amount_taxed: 3.0,

  amount_taxed_signed: 3.0,

  amount_total: 18.0,

  amount_total_signed: 18.0,

  amount_total_company_signed: 18.0,

  state: "paid",

  residual: 18.0,

  residual_signed: 18.0,

  residual_company_signed: 18.0

})

The resulting invoice has no number in it (no number in the invoice pdf or in the odoo interface).

Is there anything special I need to do to generate this number based on odoo numbering sequence ?

Also, where can I find a global listing of all models and their attributes / methods accessible through API ?