Invoice

new(invoice_number : String, amount : Float64, issue_date : String, due_date : String, client_name : String, user_id : Int64, status : String = "pending", description : String | Nil = nil, id : Int64 | Nil = nil, created_at : Time | Nil = nil)

all(limit : Int32 = 20, offset : Int32 = 0, user_id : Int64 | Nil = nil, status : String | Nil = nil) : Array(Invoice)

count(user_id : Int64 | Nil = nil, status : String | Nil = nil) : Int64

find(id : Int64) : Invoice | Nil

find_by_invoice_number(invoice_number : String) : Invoice | Nil

amount=(amount : Float64)

client_name=(client_name : String)

created_at=(created_at : Time | Nil)

description=(description : String | Nil)

due_date=(due_date : String)

id=(id : Int64 | Nil)

invoice_number=(invoice_number : String)

issue_date=(issue_date : String)

status=(status : String)

to_json(json : JSON::Builder)

user_id=(user_id : Int64)