Loopback 无法通过 relation 获取 self 的数据
Loopback can't fetch data with self through relation
基于用户模型的会员模型
{
"name": "Member",
"base": "User",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"nickname": {
"type": "string"
}
},
"validations": [],
"relations": {
"messages": {
"type": "hasMany",
"model": "Message",
"foreignKey": ""
},
"followers": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followeeId",
"through": "Follow"
},
"followings": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followerId",
"through": "Follow"
}
},
"acls": [
{
"accessType": "*",
"principalType": "ROLE",
"principalId": "$everyone",
"permission": "DENY"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__followers"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__followings"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__messages"
}
],
"methods": {}
}
关注模特
{
"name": "Follow",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {},
"validations": [],
"relations": {
"follower": {
"type": "belongsTo",
"model": "Member",
"foreignKey": ""
},
"followee": {
"type": "belongsTo",
"model": "Member",
"foreignKey": ""
}
},
"acls": [],
"methods": {}
}
示例 1
使用数据库中的这些数据,当我尝试获取成员 1 的关注者和关注者时,我遇到了同样的错误。
Erreur non traitée pour la demande GET /api/Members/1/followers?access_token=t0oAVZM2CLJ7XLqQm2zxz8wj3fLmtUATHopDM40WYknLURbiObpVAlSD3DBEIOfv : Error: La relation "member" n'est pas définie pour le modèle Follow
at processIncludeItem (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:289:10)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:180:5
at /home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:3025:16
at eachOfArrayLike (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:940:9)
at eachOf (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:990:5)
at Object.eachLimit (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:3089:3)
at Function.Inclusion.include (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:179:9)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/node_modules/loopback-connector/lib/sql.js:1203:44
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:172:22
at doNotify (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
at PostgreSQL.ObserverMixin._notifyBaseObservers (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:122:5)
at PostgreSQL.ObserverMixin.notifyObserversOf (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:97:8)
at cbForWork (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:162:14)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/node_modules/loopback-connector/lib/sql.js:428:7
at Query.<anonymous> (/home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/lib/postgresql.js:162:7)
at Query.handleReadyForQuery (/home/thomas/Bureau/Projet/Project/node_modules/pg/lib/query.js:124:10)
示例 2
数据库中的这些数据是我尝试获取成员 1 的关注者时的结果。
我不明白为什么我无法在这两个示例中获取数据。顺便说一句,我正在使用 PostgreSQL。谢谢。
您需要根据 Member
修正 Follow
模型中的关系。
{
"name": "Follow",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {},
"validations": [],
"relations": {
"follower": {
"type": "belongsTo",
"model": "Member",
"foreignKey": "followeeId"
},
"followee": {
"type": "belongsTo",
"model": "Member",
"foreignKey": "followerId"
}
},
"acls": [],
"methods": {}
}
并且在member.json
...
"followers": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followeeId",
"keyThrough": "followerId",
"through": "Follow"
},
"followings": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followerId",
"keyThrough": "followeeId",
"through": "Follow"
}
...
基于用户模型的会员模型
{
"name": "Member",
"base": "User",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"nickname": {
"type": "string"
}
},
"validations": [],
"relations": {
"messages": {
"type": "hasMany",
"model": "Message",
"foreignKey": ""
},
"followers": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followeeId",
"through": "Follow"
},
"followings": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followerId",
"through": "Follow"
}
},
"acls": [
{
"accessType": "*",
"principalType": "ROLE",
"principalId": "$everyone",
"permission": "DENY"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__followers"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__followings"
},
{
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW",
"property": "__get__messages"
}
],
"methods": {}
}
关注模特
{
"name": "Follow",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {},
"validations": [],
"relations": {
"follower": {
"type": "belongsTo",
"model": "Member",
"foreignKey": ""
},
"followee": {
"type": "belongsTo",
"model": "Member",
"foreignKey": ""
}
},
"acls": [],
"methods": {}
}
示例 1
使用数据库中的这些数据,当我尝试获取成员 1 的关注者和关注者时,我遇到了同样的错误。
Erreur non traitée pour la demande GET /api/Members/1/followers?access_token=t0oAVZM2CLJ7XLqQm2zxz8wj3fLmtUATHopDM40WYknLURbiObpVAlSD3DBEIOfv : Error: La relation "member" n'est pas définie pour le modèle Follow
at processIncludeItem (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:289:10)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:180:5
at /home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:3025:16
at eachOfArrayLike (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:940:9)
at eachOf (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:990:5)
at Object.eachLimit (/home/thomas/Bureau/Projet/Project/node_modules/async/dist/async.js:3089:3)
at Function.Inclusion.include (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/include.js:179:9)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/node_modules/loopback-connector/lib/sql.js:1203:44
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:172:22
at doNotify (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:99:49)
at PostgreSQL.ObserverMixin._notifyBaseObservers (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:122:5)
at PostgreSQL.ObserverMixin.notifyObserversOf (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:97:8)
at cbForWork (/home/thomas/Bureau/Projet/Project/node_modules/loopback-datasource-juggler/lib/observer.js:162:14)
at /home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/node_modules/loopback-connector/lib/sql.js:428:7
at Query.<anonymous> (/home/thomas/Bureau/Projet/Project/node_modules/loopback-connector-postgresql/lib/postgresql.js:162:7)
at Query.handleReadyForQuery (/home/thomas/Bureau/Projet/Project/node_modules/pg/lib/query.js:124:10)
示例 2
数据库中的这些数据是我尝试获取成员 1 的关注者时的结果。
我不明白为什么我无法在这两个示例中获取数据。顺便说一句,我正在使用 PostgreSQL。谢谢。
您需要根据 Member
修正 Follow
模型中的关系。
{
"name": "Follow",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {},
"validations": [],
"relations": {
"follower": {
"type": "belongsTo",
"model": "Member",
"foreignKey": "followeeId"
},
"followee": {
"type": "belongsTo",
"model": "Member",
"foreignKey": "followerId"
}
},
"acls": [],
"methods": {}
}
并且在member.json
...
"followers": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followeeId",
"keyThrough": "followerId",
"through": "Follow"
},
"followings": {
"type": "hasMany",
"model": "Member",
"foreignKey": "followerId",
"keyThrough": "followeeId",
"through": "Follow"
}
...