| from django.core.management.base import LabelCommand |
| |
| class Command(LabelCommand): |
| help = "Creates the table needed to use the SQL cache backend." |
| args = "<tablename>" |
| label = 'tablename' |
| |
| requires_model_validation = False |
| |
| def handle_label(self, tablename, **options): |
| from django.db import connection, transaction, models |
| fields = ( |
| # "key" is a reserved word in MySQL, so use "cache_key" instead. |
| models.CharField(name='cache_key', max_length=255, unique=True, primary_key=True), |
| models.TextField(name='value'), |
| models.DateTimeField(name='expires', db_index=True), |
| ) |
| table_output = [] |
| index_output = [] |
| qn = connection.ops.quote_name |
| for f in fields: |
| field_output = [qn(f.name), f.db_type()] |
| field_output.append("%sNULL" % (not f.null and "NOT " or "")) |
| if f.primary_key: |
| field_output.append("PRIMARY KEY") |
| elif f.unique: |
| field_output.append("UNIQUE") |
| if f.db_index: |
| unique = f.unique and "UNIQUE " or "" |
| index_output.append("CREATE %sINDEX %s_%s ON %s (%s);" % \ |
| (unique, tablename, f.name, qn(tablename), |
| qn(f.name))) |
| table_output.append(" ".join(field_output)) |
| full_statement = ["CREATE TABLE %s (" % qn(tablename)] |
| for i, line in enumerate(table_output): |
| full_statement.append(' %s%s' % (line, i < len(table_output)-1 and ',' or '')) |
| full_statement.append(');') |
| curs = connection.cursor() |
| curs.execute("\n".join(full_statement)) |
| for statement in index_output: |
| curs.execute(statement) |
| transaction.commit_unless_managed() |
