Class Substr

django.db.models.functions.text.Substr

Declaration

class Substr(Func)

Methods

▶ def __init__(self, expression, pos, length=None, **extra) override
expression: the name of a field, or an expression returning a string pos: an integer > 0, or an expression returning an integer length: an optional number of characters to return
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This method overrides django.db.models.expressions.Func.__init__.
▷ def as_oracle(self, compiler, connection, **extra_context)
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▶ def as_sqlite(self, compiler, connection, **extra_context) override
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This method overrides django.db.models.expressions.SQLiteNumericMixin.as_sqlite.

Inherited methods

Methods inherited from django.db.models.expressions.Func:
__repr__, as_sql, copy, get_source_expressions, resolve_expression, set_source_expressions
Methods inherited from django.db.models.expressions.BaseExpression:
__eq__, __getstate__, __hash__, asc, conditional, contains_aggregate, contains_column_references, contains_over_clause, convert_value, desc, field, flatten, get_db_converters, get_group_by_cols, get_lookup, get_source_fields, get_transform, identity, output_field, relabeled_clone, reverse_ordering, select_format
Methods inherited from django.db.models.expressions.Combinable:
__add__, __and__, __mod__, __mul__, __neg__, __or__, __pow__, __radd__, __rand__, __rmod__, __rmul__, __ror__, __rpow__, __rsub__, __rtruediv__, __sub__, __truediv__, bitand, bitleftshift, bitor, bitrightshift, bitxor

Reexports

Imported in django.db.models.functions.