GraphQL AWS AMplify @connection未引入已连接的数据
GraphQL AWS AMplify @connection未引入已连接的数据
提问于 2020-10-07 06:50:17
我想把所有的赛季和分区都列在联赛表上，就像你在data > seasons看到的那样。我已经设置好了，我相信使用@connection就可以了。
因此，问题是，我必须如何更改我的分区模式，以便将分区包含在League中。
我花了很长时间阅读了@connections和@key，并理解了当使用密钥时，哈希是用我给他们的ID创建的。但是，在多次阅读connections文档之后，我还是不太理解为什么这个方法不起作用。
我很想更好地理解这一点，所以我正在尽我所能去尝试发展一种理解！
注:我认为值得一提的是，每次我更改模式和amplify mock重新构建散列键时，都会添加散列键。我想知道这是否有一些影响？当涉及到键时，我应该在每次模式更改时完全清除SQLite吗？
联盟架构
type League @model
{
id: ID!
name: String!
faId: ID!
logo: String
seasons: [Season] @connection(keyName: "bySeason", fields: ["id"])
division: [Division] @connection(keyName: "byDivision", fields: ["id"])
}Schama季节
type Season @model @key(name: "bySeason", fields: ["leagueID"])
{
id: ID!
name: String!
faId: ID!
yearStart: AWSDate
yearEnd: AWSDate
leagueID: ID!
league: League! @connection(fields: ["leagueID"])
division: [Division] @connection(keyName: "byDivision", fields: ["id"])
}部门架构
type Division @model
@key(name: "byDivisionFromSeason", fields: ["leagueID" "name"])
@key(name: "byDivision", fields: ["seasonID", "leagueID"])
{
id: ID!
name: String!
faId: ID!
divisionSeasonFaId: String
leagueID: ID!
seasonID: ID!
league: League! @connection(fields: ["leagueID"])
season: Season! @connection(fields: ["seasonID"])
teams: [TeamConnection] @connection(keyName: "byTeamDivision", fields: ["id"])
games: [Game] @connection(keyName: "byGameForDivision", fields: ["id"])
ageInput: String!
level: Int!
}查询
listLeagues {
items {
name
division {
items {
name
}
}
seasons {
items {
name
division {
items {
name
}
}
}
}
}
}数据
我在这里展示了该结构是正确的，因为League中包含的Seasons如预期的那样具有Divisions
{
"data": {
"listLeagues": {
"items": [
{
"name": "Southern Amateur League",
"division": {
"items": []
},
"seasons": {
"items": [
{
"name": "2020-21",
"division": {
"items": [
{
"name": "Junior Section Division 5B South"
},
{
"name": "Junior Section Division 4 South"
},
{
"name": "Intermediate Division 3"
},
]
}
},
{
"name": "2019-20",
"division": {
"items": []
}
},
]
}
}
]
}
}
}编辑
由于只将除法上的键减少为每个键上的seasonID和leagueID，因此在清除数据时似乎抛出了一个不寻常的错误。我曾经相信@connection上的return null是完全有效的？
回答 2
Stack Overflow用户
发布于 2020-10-26 07:39:25
也许这应该是一个评论而不是一个实际的答案，但我需要描述这个模式，如果你认为合适的话，我会在稍后删除它。
Jamie，只是为了测试，你能试试下面的模式吗？它基本上与纳德提出的模式相同，只是从Division上的key中删除了字段name
type League @model
{
id: ID!
name: String!
faId: ID!
logo: String
seasons: [Season] @connection(keyName: "bySeason", fields: ["id"])
division: [Division] @connection(keyName: "byDivision", fields: ["id"])
}
type Season @model @key(name: "bySeason", fields: ["leagueID"])
{
id: ID!
name: String!
faId: ID!
yearStart: AWSDate
yearEnd: AWSDate
leagueID: ID!
league: League! @connection(fields: ["leagueID"])
division: [Division] @connection(keyName: "byDivisionFromSeason", fields: ["id"])
}
type Division @model
@key(name: "byDivisionFromSeason", fields: ["seasonID", "leagueID"])
@key(name: "byDivision", fields: ["leagueID", "seasonID"])
{
id: ID!
name: String!
faId: ID!
divisionSeasonFaId: String
leagueID: ID!
seasonID: ID!
league: League! @connection(fields: ["leagueID"])
season: Season! @connection(fields: ["seasonID"])
teams: [TeamConnection] @connection(keyName: "byTeamDivision", fields: ["id"])
games: [Game] @connection(keyName: "byGameForDivision", fields: ["id"])
ageInput: String!
level: Int!
}我认为你得到的错误，即：
"errors": [ { "message": "Query condition missed key schema element", "errorType": "DynamoDB:ValidationException", "data": null, "errorInfo": null, "path": [ "listLeagues", "items", 1, "division" ], "locations": [ { "line": 10, "column": 9, "sourceName": "GraphQL request" } ] }可以通过使用条件name运行查询来激发。
Stack Overflow用户
发布于 2020-10-11 21:01:44
由于您在分区上设置了两种不同类型的查询模式(一种是使用联赛ID的联赛查询模式，另一种是使用赛季ID的赛季查询模式)，因此应该创建两个索引。尝试如下所示：
type League @model {
id: ID!
name: String!
faId: ID!
logo: String
seasons: [Season] @connection(keyName: "bySeason", fields: ["id"])
division: [Division] @connection(keyName: "byDivision", fields: ["id"])
}
type Season @model @key(name: "bySeason", fields: ["leagueID"]) {
id: ID!
name: String!
faId: ID!
yearStart: AWSDate
yearEnd: AWSDate
leagueID: ID!
league: League! @connection(fields: ["leagueID"])
division: [Division] @connection(keyName: "byDivisionFromSeason", fields: ["id"])
}
type Division @model
@key(name: "byDivisionFromSeason", fields: ["seasonID", "leagueID", "name"])
@key(name: "byDivision", fields: ["leagueID", "seasonID", "name"]) {
id: ID!
name: String!
faId: ID!
leagueID: ID!
seasonID: ID!
league: League! @connection(fields: ["leagueID"])
season: Season! @connection(fields: ["seasonID"])
ageInput: String!
level: Int!
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64234829
复制相关文章
相似问题
腾讯云开发者
