22 lines
639 B
Python
22 lines
639 B
Python
import logging
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from sqlalchemy.types import TypeDecorator, Text
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from sqlalchemy.dialects.mysql import TEXT as MySQLText, LONGTEXT
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logger = logging.getLogger(__name__)
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class UTF8LongText(TypeDecorator):
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""" Platform-independent UTF-8 LONGTEXT type.
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Uses MySQL's LongText with charset utf8mb4, otherwise uses TEXT, because
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other engines default to UTF-8 and have longer TEXT fields.
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"""
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impl = Text
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def load_dialect_impl(self, dialect):
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if dialect.name == 'mysql':
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return dialect.type_descriptor(LONGTEXT(charset='utf8mb4', collation='utf8mb4_unicode_ci'))
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else:
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return dialect.type_descriptor(Text())
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