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import sqlite3
from peewee import *
class MemoryConnection(sqlite3.Connection):
def __init__(self, dbname, *args, **kwargs):
load_conn = sqlite3.connect(dbname)
super(MemoryConnection, self).__init__(":memory:", *args, **kwargs)
load_conn.backup(self)
load_conn.close()
class SqliteMemDatabase(SqliteDatabase):
def __init__(self, database, *args, **kwargs) -> None:
self.dbname = database
super().__init__(database, *args, factory=MemoryConnection, **kwargs)
def reload(self, dbname=None):
if dbname is None:
dbname = self.dbname
load_conn = sqlite3.connect(dbname)
try:
load_conn.backup(self._state.conn)
finally:
load_conn.close()
def save(self, dbname=None):
if dbname is None:
dbname = self.dbname
save_conn = sqlite3.connect(dbname)
try:
self._state.conn.backup(save_conn)
finally:
save_conn.close()
db: SqliteDatabase = None
tag_cache_map = {}
def get_tag_by_id(id):
if id not in tag_cache_map:
tag_cache_map[id] = Tag.get_by_id(id)
return tag_cache_map[id]
class EnumField(IntegerField):
def __init__(self, enum_list, *args, **kwargs):
super().__init__(*args, **kwargs)
self.enum_list = enum_list
self.enum_map = {value: index for index, value in enumerate(enum_list)}
def db_value(self, value):
if isinstance(value, str):
return self.enum_map[value]
assert isinstance(value, int)
return value
def python_value(self, value):
if value is not None:
return self.enum_list[value]
class BaseModel(Model):
class Meta:
database = db
class Tag(BaseModel):
id = IntegerField(primary_key=True)
name = CharField(unique=True)
type = EnumField(["general", "artist", "character", "copyright", "meta"])
popularity = IntegerField()
_posts: ManyToManyField
_posts_cache = None
@property
def posts(self):
if self._posts_cache is None:
self._posts_cache = list(self._posts)
return self._posts_cache
def __str__(self):
return f"<Tag '{self.name}'>"
def __repr__(self):
from objprint import objstr
return f"<Tag|#{self.id}|{self.name}|{self.type[:2]}>"
class Post(BaseModel):
id = IntegerField(primary_key=True)
created_at = CharField()
uploader_id = IntegerField()
source = CharField()
md5 = CharField(null=True)
parent_id = IntegerField(null=True)
has_children = BooleanField()
is_deleted = BooleanField()
is_banned = BooleanField()
pixiv_id = IntegerField(null=True)
has_active_children = BooleanField()
bit_flags = IntegerField()
has_large = BooleanField()
has_visible_children = BooleanField()
image_width = IntegerField()
image_height = IntegerField()
file_size = IntegerField()
file_ext = CharField()
rating = EnumField(["general", "sensitive", "questionable", "explicit"])
score = IntegerField()
up_score = IntegerField()
down_score = IntegerField()
fav_count = IntegerField()
file_url = CharField()
large_file_url = CharField()
preview_file_url = CharField()
_tags: ManyToManyField
_tags_cache = None
_tag_list = TextField(column_name="tag_list")
tag_count = IntegerField()
tag_count_general = IntegerField()
tag_count_artist = IntegerField()
tag_count_character = IntegerField()
tag_count_copyright = IntegerField()
tag_count_meta = IntegerField()
@property
def tag_list(self):
if self._tags_cache is None:
self._tags_cache = list(self._tags)
return self._tags_cache
@property
def tag_list_general(self):
return [tag for tag in self.tag_list if tag.type == "general"]
@property
def tag_list_artist(self):
return [tag for tag in self.tag_list if tag.type == "artist"]
@property
def tag_list_character(self):
return [tag for tag in self.tag_list if tag.type == "character"]
@property
def tag_list_copyright(self):
return [tag for tag in self.tag_list if tag.type == "copyright"]
@property
def tag_list_meta(self):
return [tag for tag in self.tag_list if tag.type == "meta"]
class PostTagRelation(BaseModel):
post = ForeignKeyField(Post, backref="post_tags")
tag = ForeignKeyField(Tag, backref="tag_posts")
tags = ManyToManyField(Tag, backref="_posts", through_model=PostTagRelation)
tags.bind(Post, "_tags", set_attribute=True)
def load_db(db_file: str):
global db
db = SqliteDatabase(db_file)
Post._meta.database = db
Tag._meta.database = db
PostTagRelation._meta.database = db
db.connect()
if __name__ == "__main__":
load_db("danbooru2023.db")
post = Post.get_by_id(1)
print(post.tag_count_general, len(post.tag_list_general), post.tag_list_general)
print(post.tag_count_artist, len(post.tag_list_artist), post.tag_list_artist)
print(
post.tag_count_character, len(post.tag_list_character), post.tag_list_character
)
print(
post.tag_count_copyright, len(post.tag_list_copyright), post.tag_list_copyright
)
print(post.tag_count_meta, len(post.tag_list_meta), post.tag_list_meta)
tag = Tag.select().where(Tag.name == "umamusume").first()
print(tag)
print(len(tag.posts))
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