Ale*_*and 4 python sqlalchemy flask-sqlalchemy graphql graphene-python
我正在使用 Python 包 Flask、SQLAlchemy、Graphene 和 Graphene-SQLAlchemy 构建 GraphQL API。我遵循了SQLAlchemy + Flask 教程。我能够执行查询和更改来创建记录。现在我想知道更新现有记录的最佳方法是什么。
这是我当前的脚本schema.py:
from graphene_sqlalchemy import SQLAlchemyObjectType
from database.batch import BatchOwner as BatchOwnerModel
import api_utils # Custom methods to create records in database
import graphene
class BatchOwner(SQLAlchemyObjectType):
"""Batch owners."""
class Meta:
model = BatchOwnerModel
interfaces = (graphene.relay.Node,)
class CreateBatchOwner(graphene.Mutation):
"""Create batch owner."""
class Arguments:
name = graphene.String()
# Class attributes
ok = graphene.Boolean()
batch_owner = graphene.Field(lambda: BatchOwner)
def mutate(self, info, name):
record = {'name': name}
api_utils.create('BatchOwner', record) # Custom methods to create records in database
batch_owner = BatchOwner(name=name)
ok = True
return CreateBatchOwner(batch_owner=batch_owner, ok=ok)
class Query(graphene.ObjectType):
"""Query endpoint for GraphQL API."""
node = graphene.relay.Node.Field()
batch_owner = graphene.relay.Node.Field(BatchOwner)
batch_owners = SQLAlchemyConnectionField(BatchOwner)
class Mutation(graphene.ObjectType):
"""Mutation endpoint for GraphQL API."""
create_batch_owner = CreateBatchOwner.Field()
schema = graphene.Schema(query=Query, mutation=Mutation)
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评论:
BatchOwner只有 2 个属性(Id、名称)BatchOwner名称,我假设我需要提供数据库 ID(而不是中继全局 ID)作为某些更新方法的输入参数BatchOwner从我的客户那里查询 a 时,Graphene 只返回给我 base64 编码的全局 ID(例如:QmF0Y2hPd25lcjox,对应于BatchOwner:1)响应示例:
{
"data": {
"batchOwners": {
"edges": [
{
"node": {
"id": "QmF0Y2hPd25lcjox",
"name": "Alexis"
}
}
]
}
}
}
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我目前想到的解决方案是:
有一个更好的方法吗?
我找到了使用该方法的解决方案from_global_id(此处记录)
from graphql_relay.node.node import from_global_id
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我将以下类添加到schema.py:
class UpdateBatchOwner(graphene.Mutation):
"""Update batch owner."""
class Arguments:
id = graphene.String()
name = graphene.String()
# Class attributes
ok = graphene.Boolean()
batch_owner = graphene.Field(lambda: BatchOwner)
def mutate(self, info, id, name):
id = from_global_id(id)
record = {'id': id[1], 'name': name}
api_utils.update('BatchOwner', record)
batch_owner = BatchOwner(id=id, name=name)
ok = True
return UpdateBatchOwner(batch_owner=batch_owner, ok=ok)
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我更新了 Mutation 类:
class Mutation(graphene.ObjectType):
"""Mutation endpoint for GraphQL API."""
create_batch_owner = CreateBatchOwner.Field()
update_batch_owner = UpdateBatchOwner.Field()
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我想知道是否有更直接的方法来做到这一点?
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