class trytond.model.Model([id[, \**kwargs]])

This is the base class that every kind of model inherits. It defines common attributes of all models.

Class attributes are:


It contains the a unique name to reference the model throughout the platform.


A set that contains the names of relation field for which the access rights are also checked for this model.


It contains a dictionary with method name as key and an instance of trytond.rpc.RPC as value.


It contains the name of the field used as name of records. The default value is ‘name’.

The definition of the field id of records.


It returns a queue caller for the model. The called method will be pushed into the queue.


It contains a dictionary with the field name as key and its field instance as value.


It stores the record class to store internaly the values of the instances.


It contains a dictionary with the field name as key and its default method as value.

Class methods:

classmethod Model.__setup__()

Setup the class before adding into the trytond.pool.Pool.

classmethod Model.__post_setup__()

Setup the class after added into the trytond.pool.Pool.

classmethod Model.__register__(module_name)

Registers the model in ir.model and ir.model.field.

classmethod Model.default_get(fields_names[, with_rec_name])

Returns a dictionary with the default values for each field in fields_names. Default values are defined by the returned value of each instance method with the pattern default_`field_name`(). with_rec_name allow to add rec_name value for each many2one field. The default_rec_name key in the context can be used to define the value of the Model._rec_name field.

classmethod Model.fields_get([fields_names[, level]])

Return the definition of each field on the model. The level defines the number of relations to include in the relation field definition.

classmethod Model.__names__([field])

Returns a dictionary with the name of the model and the field. It is a convenience-method used to format messages which should include those names.

Instance methods:


This method is called by the client to validate the instance.


class trytond.model.ModelView

It adds requirements to display a view of the model in the client.

Class attributes:


It contains a dictionary with button name as key and the states dictionary for the button. The states possible keys are invisible, readonly and icon which have a PYSON statement as value and depends which has a list of field names on which the button states depend. The keys will be set as default attributes on the buttons for the views that show them.

Static methods:

static ModelView.button()

Decorate button method to check group access and rule.

static ModelView.button_action(action)

Same as ModelView.button() but return the action id of the XML id action or the action value updated by the returned value of the method.

static ModelView.button_change([\*fields[, methods]])

Same as ModelView.button() but for button that change values of the fields on client side (similar to on_change). The methods argument can be used to duplicate the field names from other decorated methods. This is useful if the decorated method calls another method.


Only on instance methods.

Class methods:

classmethod ModelView.fields_view_get([view_id[, view_type[, level]]])

Return a view definition used by the client. The definition is:

    'model': model name,
    'type': view type,
    'view_id': view id,
    'arch': XML description,
    'fields': {
        field name: {
    'field_childs': field for tree,
classmethod ModelView.view_toolbar_get()
Returns the model specific actions and exports in a dictionary with keys:
  • print: a list of available reports

  • action: a list of available actions

  • relate: a list of available relations

  • exports: a list of available exports

classmethod ModelView.view_attributes()

Returns a list of XPath, attribute, value and an optional depends list. Each element from the XPath will get the attribute set with the JSON encoded value. If the depends list is set its fields are added to the view if the xpath matches at least one element.

classmethod ModelView.parse_view(tree, type[, field_children[, level[, view_depends]]])

Return the sanitized XML and the corresponding fields definition.


This method is public mainly to allow modification the existing XML of the view by code.

Instance methods


Returns the list of changes by calling on_change method of each field.


Returns the new values of all fields by calling on_change_with method of each field.


class trytond.model.ModelStorage

It adds storage capability.

Class attributes are:


The definition of the trytond.model.fields.Many2One field create_uid of records. It contains the id of the user who creates the record.


The definition of the trytond.model.fields.DateTime field create_date of records. It contains the datetime of the creation of the record.


The definition of the trytond.model.fields.Many2One field write_uid of the records. It contains the id of the last user who writes on the record.


The definition of the trytond.model.fields.DateTime field write_date of the records. It contains the datetime of the last write on the record.


The definition of the trytond.model.fields.Function field rec_name. It is used in the client to display the records with a single string.

Static methods:

static ModelStorage.default_create_uid()

Return the default value for create_uid.

static ModelStorage.default_create_date()

Return the default value for create_date.

Class methods:

classmethod ModelStorage.create(vlist)

Create records. vlist is list of dictionaries with fields names as key and created values as value and return the list of new instances.

classmethod ModelStorage.trigger_create(records)

Trigger create actions. It will call actions defined in ir.trigger if on_create is set and condition is true.

classmethod, fields_names)

Return a list of dictionary for the record ids. The dictionary is composed of the fields as key and their values. fields_names can contain dereferenced fields from related models. Their values will be returned under the referencing field suffixed by a .. The number of dots in the name is not limited. The order of the returned list is not guaranteed.

classmethod ModelStorage.write(records, values[[, records, values], ...])

Write values on the list of records. values is a dictionary with fields names as key and writen values as value.

classmethod ModelStorage.trigger_write_get_eligibles(records)

Return eligible records for write actions by triggers. This dictionary is to pass to trigger_write().

classmethod ModelStorage.trigger_write(eligibles)

Trigger write actions. It will call actions defined in ir.trigger if on_write is set and condition was false before write() and true after.

classmethod ModelStorage.index_set_field(name)

Return the index sort order of the field set calls.

classmethod ModelStorage.delete(records)

Delete records.

classmethod ModelStorage.trigger_delete(records)

Trigger delete actions. It will call actions defined in ir.trigger if on_delete is set and condition is true.

classmethod ModelStorage.copy(records[, default])

Duplicate the records. default is a dictionary of default value per field name for the created records.

The values of default may be also callable that take a dictionary containing the fields and values of the record copied and return of the value.

The keys of default may use the dotted notation for the fields.One2Many to define the default to pass to its copy operation.

New records are returned following the input order.

classmethod[, offset[, limit[, order[, count]]]])

Return a list of records that match the domain.

If offset or limit are set, the result starts at the offset and has the length of the limit.

The order is a list of tuples defining the order of the result:

[ (‘field name’, ‘ASC’), (‘other field name’, ‘DESC’), … ]

The first element of the tuple is a field name of the model and the second is the sort ordering as ASC for ascending, DESC for descending or empty for a default order. This second element may contain ‘NULLS FIRST’ or ‘NULLS LAST’ to sort null values before or after non-null values. If neither is specified the default behavior of the backend is used.

In case the field used is a fields.Many2One, it is also possible to use the dotted notation to sort on a specific field from the target record. Or for a fields.Dict field, the dotted notation is used to sort on the key’s value.

If count is set to True, then the result is the number of records.

classmethod ModelStorage.search_count(domain)

Return the number of records that match the domain.

classmethod ModelStorage.search_read(domain[, offset[, limit[, order[, fields_names]]]])

Call search() and read() at once. Useful for the client to reduce the number of calls.

classmethod ModelStorage.search_rec_name(name, clause)

Searcher for the trytond.model.fields.Function field rec_name.

classmethod ModelStorage.search_global(cls, text)

Yield tuples (record, name, icon) for records matching text. It is used for the global search.

classmethod ModelStorage.browse(ids)

Return a list of record instance for the ids.

classmethod ModelStorage.export_data(records, fields_names)

Return a list of list of values for each records. The list of values follows fields_names. Relational fields are defined with / at any depth. Descriptor on fields are available by appending . and the name of the method on the field that returns the descriptor.

classmethod ModelStorage.export_data_domain(domain, fields_names[, offset[, limit[, order]]])

Call search() and :meth`export_data` together. Useful for the client to reduce the number of calls and the data transfered.

classmethod ModelStorage.import_data(fields_names, data)

Create or update records for all values in data. The field names of values must be defined in fields_names. It returns the number of imported records.

classmethod ModelStorage.check_xml_record(records, values)

Verify if the records are originating from XML data. It is used to prevent modification of data coming from XML files. This method must be overiden to change this behavior.

classmethod ModelStorage.validate(records)

Validate the integrity of records after creation and modification. This method must be overridden to add validation and must raise an exception if validation fails.

Dual methods:


Save the modification made on the records.

Instance methods:


Return a dictionary with the number of attachments (attachment_count), notes (note_count) and unread note (note_unread).


Getter for the trytond.model.fields.Function field rec_name.


class trytond.model.ModelSQL

It implements ModelStorage for an SQL database.

Class attributes are:


The name of the database table which is mapped to the class. If not set, the value of Model._name is used with dots converted to underscores.


The default order parameter of method.


The name of the field (or an SQL statement) on which the records must be sorted when sorting on a field refering to the model. If not set, ModelStorage._rec_name will be used.


If true, all changes on records will be stored in a history table.


A list of SQL constraints that are added on the table:

[ (‘constraint name’, constraint, ‘xml id’), … ]

Class methods:

classmethod ModelSQL.__table__()

Return a SQL Table instance for the Model.

classmethod ModelSQL.__table_history__()

Return a SQL Table instance for the history of Model.

classmethod ModelSQL.__table_handler__([module_name[, history]])

Return a TableHandler for the Model.

classmethod ModelSQL.table_query()

Could be defined to use a custom SQL query instead of a table of the database. It should return a SQL FromItem.


By default all CRUD operation will raise an error on models implementing this method so the create, write and delete methods may also been overriden if needed.

classmethod ModelSQL.history_revisions(ids)

Return a sorted list of all revisions for ids. The list is composed of the date, id and username of the revision.

classmethod ModelSQL.restore_history(ids, datetime)

Restore the record ids from history at the specified date time. Restoring a record will still generate an entry in the history table.


No access rights are verified and the records are not validated.

classmethod ModelSQL.restore_history_before(ids, datetime)

Restore the record ids from history before the specified date time. Restoring a record will still generate an entry in the history table.


No access rights are verified and the records are not validated.

classmethod[, offset[, limit[, order[, count[, query]]]]])

Same as with the additional query argument. If query is set to True, the the result is the SQL query.

classmethod ModelSQL.search_domain(domain[, active_test[, tables]])

Convert a domain into a SQL expression by returning the updated tables dictionary and a SQL expression.

Where tables is a nested dictionary containing the existing joins:

    None: (<Table invoice>, None),
    'party': {
        None: (<Table party>, <join_on sql expression>),
        'addresses': {
            None: (<Table address>, <join_on sql expression>),

Dual methods:

classmethod ModelSQL.lock(records)

Take a lock for update on the records.


class trytond.model.Constraint(table)

It represents a SQL constraint on a table of the database and it follows the API of the python-sql expression.

Instance attributes:


The SQL Table on which the constraint is defined.


class trytond.model.Check(table, expression)

It represents a check Constraint which enforce the validity of the expression.

Instance attributes:


The SQL expression to check.


class trytond.model.Unique(table, \*columns)

It represents a unique Constraint which enforce the uniqeness of the group of columns with respect to all the rows in the table.

Instance attributes:


The tuple of SQL Column instances.


The tuple of Equal operators.


class trytond.model.Exclude(table[, (expression, operator), ...[, where]])

It represents an exclude Constraint which guarantees that if any two rows are compared on the specified expression using the specified operator not all of these comparisons will return TRUE.

Instance attributes:


The tuple of expression and operator.


The tuple of expressions.


The tuple of operators.


The clause for which the exclusion applies.


class trytond.model.Workflow

A Mix-in class to handle transition check.

Class attribute:


The name of the field that will be used to check state transition.


A set containing tuples of from and to state.

Static methods:

static Workflow.transition(state)

Decorate method to filter ids for which the transition is valid and finally to update the state of the filtered ids.


class trytond.model.ModelSingleton

Modify ModelStorage into a singleton. This means that there will be only one record of this model. It is commonly used to store configuration value.

Class methods:

classmethod ModelSingleton.get_singleton()

Return the instance of the unique record if there is one.


class trytond.model.DictSchemaMixin

A mixin for the schema of trytond.model.fields.Dict field.

Class attributes are:

The definition of the trytond.model.fields.Char field for the name of the key.


The definition of the trytond.model.fields.Char field for the string of the key.

The definition of the trytond.model.fields.Char field used as the help text for the key.


The definition of the trytond.model.fields.Selection field for the type of the key. The available types are:

  • boolean

  • integer

  • char

  • float

  • numeric

  • date

  • datetime

  • selection


The definition of the trytond.model.fields.Integer field for the digits number when the type is float or numeric.


A domain constraint on the dictionary key that will be enforced only on the client side.

The key must be referenced by its name in the left operator of the domain. The PYSON evaluation context used to compute the domain is the dictionary value. Likewise the domain is tested using the dictionary value.


The definition of the trytond.model.fields.Text field to store the couple of key and label when the type is selection. The format is a key/label separated by “:” per line.


If the selection must be sorted on label by the client.


The definition of the trytond.model.fields.Function field to return the JSON version of the selection.

Static methods:

static DictSchemaMixin.default_digits()

Return the default value for digits.

Class methods:

classmethod DictSchemaMixin.get_keys(records)

Return the definition of the keys for the records.

classmethod DictSchemaMixin.get_relation_fields()

Return a dictionary with the field definition of all the keys like the result of Model.fields_get().

It is possible to disable this method (returns an empty dictionary) by setting in the dict section of the configuration, the Model.__name__ to False.

Instance methods:


Getter for the selection_json.


class trytond.model.MatchMixin

A mixin to add to a Model a match method on pattern. The pattern is a dictionary with field name as key and the value to compare. The record matches the pattern if for all dictionary entries, the value of the record is equal or not defined.

Instance methods:

MatchMixin.match(pattern[, match_none])

Return if the instance match the pattern. If match_none is set None value of the instance will be compared.


class trytond.model.UnionMixin

A mixin to create a ModelSQL which is the UNION of some ModelSQL’s. The ids of each models are sharded to be unique.

Static methods:

static UnionMixin.union_models()

Return the list of ModelSQL’s names

Class methods:

classmethod UnionMixin.union_shard(column, model)

Return a SQL expression that shards the column containing record id of model name.

classmethod UnionMixin.union_unshard(record_id)

Return the original instance of the record for the sharded id.

classmethod UnionMixin.union_column(name, field, table, Model)

Return the SQL column that corresponds to the field on the union model.

classmethod UnionMixin.union_columns(model)

Return the SQL table and columns to use for the UNION for the model name.


class trytond.model.SymbolMixin

A mixin to manage the display of symbols on the client side.

Instance methods:

SymbolMixin.get_symbol(sign[, symbol])

Return a symbol and its position. The position indicates whether the symbol should appear before (0) or after (1) the value. If no symbol parameter is supplied then the mixin uses the value of attribute named symbol.


trytond.model.sequence_ordered([field_name[, field_label[, order]]])

Retuns a mixin class which defines the order of a ModelSQL with an trytond.model.fields.Integer field. field_name indicates the name of the field to be created and its default values is sequence. field_label defines the label which will be used by the field and defaults to Sequence. Order specifies the order direction and defaults to ASC NULLS FIRST.


class trytond.model.MultiValueMixin

A mixin for Model to help having trytond.model.fields.MultiValue fields with multi-values on a ValueMixin. The values are stored by creating one record per pattern. The patterns are the same as those on MatchMixin.

Class methods:

classmethod MultiValueMixin.multivalue_model(field)

Return the ValueMixin on which the values are stored for the field name. The default is class name suffixed by the field name.

classmethod MultiValueMixin.setter_multivalue(records, name, value, \*\*pattern)

The setter method for the trytond.model.fields.Function fields.

Instance methods:


Return the list of all ValueMixin records linked to the instance. By default, it returns the value of the first found trytond.model.fields.One2Many linked to the multivalue model or all the records of this one.

MultiValueMixin.multivalue_record(field, \*\*pattern)

Return a new record of ValueMixin linked to the instance.

MultiValueMixin.get_multivalue(name, \*\*pattern)

Return the value of the field name for the pattern.

MultiValueMixin.set_multivalue(name, value, [save, ]\*\*pattern)

Store the value of the field name for the pattern. If save is true, it will be stored in the database, otherwise the modified ValueMixin records are returned unsaved. save is true by default.


To customize the pattern, both methods must be override the same way.


class trytond.model.ValueMixin

A mixin to store the values of MultiValueMixin.


class trytond.model.DeactivableMixin

A mixin to add soft deletion to the model. It renders all the fields as read-only when the record is inactive.

Class attributes are:

The definition of the trytond.model.fields.Boolean field to store soft deletion state. False values will be consideres as soft deletion.


trytond.model.tree([parent[, name[, separator]]])

Returns a mixin class TreeMixin. parent indicates the name of the field that defines the parent of the tree and its default value is parent. name indicates the name of the field that defines the name of the record and its default value is name. If separator is set, the ModelStorage.get_rec_name() constructs the name by concatenating each parent names using it as separator and ModelStorage.search_rec_name() is adapted to search across the tree.

class trytond.model.TreeMixin
classmethod TreeMixin.check_recursion(records)

Helper method that checks if there is no recursion in the tree defined by tree().


trytond.model.avatar_mixin([size[, default]])

Returns a mixin AvatarMixin. size defines the size of the avatar image and its default value is 64. default indicates the name of the field to use for generating a default avatar, if it’s not set then no default avatar is generated.

class trytond.model.AvatarMixin

The trytond.model.fields.One2Many field used to store the ir.avatar records.


The trytond.model.fields.Binary field that contains the avatar.


The trytond.model.fields.Char field that containts the URL for the avatar.


Indicates whether the record has an avatar.

classmethod AvatarMixin.generate_avatar(records, field)

Generate a default avatar for each record using the field.