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UTF-8 v1_json_metadata, comment, manifest

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This will allow us to store unicode JSON blobs in the column on MySQL.
This commit is contained in:
Jimmy Zelinskie 2015-10-30 15:40:24 -04:00
parent c7fba332e6
commit c78c450211
3 changed files with 21 additions and 19 deletions
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19
data/migrations/versions/35f538da62_switch_manifest_text_to_a_longtext.py
View file

@ -15,28 +15,13 @@ import sqlalchemy as sa
from sqlalchemy.types import TypeDecorator, Text
from sqlalchemy.dialects.mysql import LONGTEXT
import uuid
class EngineLongText(TypeDecorator):
"""Platform-independent LongText type.
Uses MySQL's LONGTEXT type, otherwise uses
Text, because other engines are not as limited
as MySQL.
"""
impl = Text
def load_dialect_impl(self, dialect):
if dialect.name == 'mysql':
return dialect.type_descriptor(LONGTEXT())
else:
return dialect.type_descriptor(Text())
from util.migrate import UTF8LongText
def upgrade(tables):
### commands auto generated by Alembic - please adjust! ###
op.drop_column(u'tagmanifest', 'json_data')
op.add_column(u'tagmanifest', sa.Column('json_data', EngineLongText(), nullable=False))
op.add_column(u'tagmanifest', sa.Column('json_data', UTF8LongText(), nullable=False))
### end Alembic commands ###

5
data/migrations/versions/545794454f49_migrate_image_data_back_to_image_table.py
View file

@ -13,14 +13,15 @@ down_revision = '3a3bb77e17d5'
from alembic import op
import sqlalchemy as sa
from util.migrate import UTF8LongText
def upgrade(tables):
### commands auto generated by Alembic - please adjust! ###
op.add_column('image', sa.Column('aggregate_size', sa.BigInteger(), nullable=True))
op.add_column('image', sa.Column('command', sa.Text(), nullable=True))
op.add_column('image', sa.Column('comment', sa.Text(), nullable=True))
op.add_column('image', sa.Column('comment', UTF8LongText(), nullable=True))
op.add_column('image', sa.Column('created', sa.DateTime(), nullable=True))
op.add_column('image', sa.Column('v1_json_metadata', sa.Text(), nullable=True))
op.add_column('image', sa.Column('v1_json_metadata', UTF8LongText(), nullable=True))
### end Alembic commands ###

16
util/migrate/__init__.py
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@ -0,0 +1,16 @@
from sqlalchemy.types import TypeDecorator, Text
from sqlalchemy.dialects.mysql import TEXT as MySQLText, LONGTEXT
class UTF8LongText(TypeDecorator):
""" Platform-independent UTF-8 LONGTEXT type.
Uses MySQL's LongText with charset utf8mb4, otherwise uses TEXT, because
other engines default to UTF-8 and have longer TEXT fields.
"""
impl = Text
def load_dialect_impl(self, dialect):
if dialect.name == 'mysql':
return dialect.type_descriptor(LONGTEXT(charset='utf8mb4', collation='utf8mb4_unicode_ci'))
else:
return dialect.type_descriptor(Text())