WriteOnlyColumn

class dbbase.column_types.WriteOnlyColumn(*args, **kwargs)

Bases: sqlalchemy.sql.schema.Column

This class creates a subclassed column that identifies it as write only.

The use case for it derives from the need to screen out columns such as passwords from user tables.

Methods

all_()	Produce a _expression.all_() clause against the parent object.
any_()	Produce a _expression.any_() clause against the parent object.
append_foreign_key(fk)
argument_for(dialect_name, argument_name, …)	Add a new kind of dialect-specific keyword argument for this class.
asc()	Produce a _expression.asc() clause against the parent object.
between(cleft, cright[, symmetric])	Produce a _expression.between() clause against the parent object, given the lower and upper range.
bool_op(opstring[, precedence])	Return a custom boolean operator.
cast(type_)	Produce a type cast, i.e.
collate(collation)	Produce a _expression.collate() clause against the parent object, given the collation string.
compare(other[, use_proxies, equivalents])	Compare this ColumnElement to another.
compile(default[, bind, dialect])	Compile this SQL expression.
concat(other)	Implement the ‘concat’ operator.
contains(other, **kwargs)	Implement the ‘contains’ operator.
copy(**kw)	Create a copy of this Column, uninitialized.
desc()	Produce a _expression.desc() clause against the parent object.
distinct()	Produce a _expression.distinct() clause against the parent object.
endswith(other, **kwargs)	Implement the ‘endswith’ operator.
get_children([schema_visitor])	used to allow SchemaVisitor access
ilike(other[, escape])	Implement the ilike operator, e.g.
in_(other)	Implement the in operator.
is_(other)	Implement the IS operator.
is_distinct_from(other)	Implement the IS DISTINCT FROM operator.
isnot(other)	Implement the IS NOT operator.
isnot_distinct_from(other)	Implement the IS NOT DISTINCT FROM operator.
label(name)	Produce a column label, i.e.
like(other[, escape])	Implement the like operator.
match(other, **kwargs)	Implements a database-specific ‘match’ operator.
notilike(other[, escape])	implement the NOT ILIKE operator.
notin_(other)	implement the NOT IN operator.
notlike(other[, escape])	implement the NOT LIKE operator.
nullsfirst()	Produce a _expression.nullsfirst() clause against the parent object.
nullslast()	Produce a _expression.nullslast() clause against the parent object.
op(opstring[, precedence, is_comparison, …])	Produce a generic operator function.
operate(op, *other, **kwargs)	Operate on an argument.
params(*optionaldict, **kwargs)
references(column)	Return True if this Column references the given column via foreign key.
reverse_operate(op, other, **kwargs)	Reverse operate on an argument.
self_group([against])	Apply a ‘grouping’ to this _expression.ClauseElement.
shares_lineage(othercolumn)	Return True if the given _expression.ColumnElement has a common ancestor to this _expression.ColumnElement.
startswith(other, **kwargs)	Implement the startswith operator.
unique_params(*optionaldict, **kwargs)

Attributes

anon_label	Provides a constant ‘anonymous label’ for this ColumnElement.
base_columns
bind
comparator
default
description
dialect_kwargs	A collection of keyword arguments specified as dialect-specific options to this construct.
dialect_options	A collection of keyword arguments specified as dialect-specific options to this construct.
dispatch
expression	Return a column expression.
foreign_keys
info
is_clause_element
is_selectable
key
kwargs	A synonym for DialectKWArgs.dialect_kwargs.
onupdate
primary_key
proxy_set
quote	Return the value of the quote flag passed to this schema object, for those schema items which have a name field.
server_default
server_onupdate
supports_execution
table
timetuple
type