create_field.py

https://www.odoo.com/documentation/14.0/reference/orm.html#fields
  
# simple Char field
name = fields.Char(string="Name", required="True", readonly="False", invisible="False", help="The name field help string", )

# note that required, readonly and invisible might be better defined in the View where they can be controlled via attrs

# to set a default
default='' # the name of the value

# to define which groups the field is restricted to
groups='' # comma-separated list of group xml ids

# for other types, use:
fields.Boolean
fields.Char
fields.Float # this field type you probably want to define digits or reference a decimal precision
fields.Integer
fields.Binary # use attachment="False" if you don't want an ir.attachment record created
fields.Html
fields.Image
fields.Monetary # there needs to be a currency_id field on the model to use this field
fields.Selection # use selection=[('first','First Option'),('second','Second Option')]
fields.Text

fields.Date
fields.Datetime

fields.Many2one

fields.One2many

fields.Many2many