标签：ret 偏移量 div set sql elf like item state
sqlalchemy中使用query查询，而flask-sqlalchemy中使用basequery查询，他们是子类与父类的关系
假设 page_index=1,page_size=10；所有分页查询不可以再跟first(),all()等
db.session.query(User.name).filter(User.email.like(‘%‘+email+‘%‘)).limit(page_size).offset((page_index-1)*page_size) #filter语句后面可以跟order_by语句
db.session.query(User.name).filter(User.email.like(‘%‘+email+‘%‘)).slice((page_index - 1) * page_size, page_index * page_size) #filter语句后面可以跟order_by语句
注释：此方法和第一种相同的效果。
因为：由一下内部方法可知，slice()函数第一个属性就是offset()函数值，第二个属性就是limit()函数值
@_generative(_no_statement_condition) def slice(self, start, stop): """apply LIMIT/OFFSET to the ``Query`` based on a " "range and return the newly resulting ``Query``.""" if start is not None and stop is not None: self._offset = (self._offset or 0) + start self._limit = stop - start elif start is None and stop is not None: self._limit = stop elif start is not None and stop is None: self._offset = (self._offset or 0) + start if self._offset == 0: self._offset = None @_generative(_no_statement_condition) def limit(self, limit): """Apply a ``LIMIT`` to the query and return the newly resulting ``Query``. """ self._limit = limit @_generative(_no_statement_condition) def offset(self, offset): """Apply an ``OFFSET`` to the query and return the newly resulting ``Query``. """ self._offset = offset
user_obj=User.query.filter(User.email.like(‘%‘+email+‘%‘)).paginate(int(page_index), int(page_size),False) #遍历时要加上items object_list =user_obj.items
db.session.query(User.name).filter(User.email.like(‘%‘+email+‘%‘) and limit (page_index - 1) * page_size, page_size) #此处不能再跟order_by语句，否则报错
http://www.cnblogs.com/rgcLOVEyaya/p/RGC_LOVE_YAYA_350days.html
sqlalchemy和flask-sqlalchemy的几种分页方法
标签：ret 偏移量 div set sql elf like item state
原文地址：https://www.cnblogs.com/huchong/p/8822789.html
