Index classes ease creating database indexes. They can be added using the\nMeta.indexes option. This document\nexplains the API references of Index which includes the index\noptions.
Index optionsLink para este cabeçalho#Creates an index (B-Tree) in the database.
\nfieldsLink para este cabeçalho#A list or tuple of the name of the fields on which the index is desired.
\nBy default, indexes are created with an ascending order for each column. To\ndefine an index with a descending order for a column, add a hyphen before the\nfield’s name.
\nFor example Index(fields=['headline', '-pub_date']) would create SQL with\n(headline, pub_date DESC). Index ordering isn’t supported on MySQL. In that\ncase, a descending index is created as a normal index.
nameLink para este cabeçalho#The name of the index. If name isn’t provided Django will auto-generate a\nname. For compatibility with different databases, index names cannot be longer\nthan 30 characters and shouldn’t start with a number (0-9) or underscore (_).
db_tablespaceLink para este cabeçalho#The name of the database tablespace to use for\nthis index. For single field indexes, if db_tablespace isn’t provided, the\nindex is created in the db_tablespace of the field.
If Field.db_tablespace isn’t specified (or if the index uses multiple\nfields), the index is created in tablespace specified in the\ndb_tablespace option inside the model’s\nclass Meta. If neither of those tablespaces are set, the index is created\nin the same tablespace as the table.