我想使用 AWS AppSync 上传图片。按照我在这里看到的是我如何配置我的 appsync 应用程序。
架构:
input PictureInput {
ede_number: String!
file: S3ObjectInput!
}
enum Visibility {
public
private
}
type S3Object {
bucket: String!
region: String!
key: String!
}
input S3ObjectInput {
bucket: String!
region: String!
localUri: String
visibility: Visibility
key: String
mimeType: String
}
type Picture {
picture_id: String!
ede_number: String!
file: S3Object
}
type Mutation {
addPicture(picture: PictureInput!): Picture
}
映射解析器:
{
"version": "2017-02-28",
"operation": "PutItem",
"key": {
"picture_id": { "S" : "${util.autoId()}"}
},
#set( $attribs = $util.dynamodb.toMapValues($ctx.args.picture) )
#set( $attribs.author = $util.dynamodb.toString($context.identity.username) )
#set( $attribs.company = $util.dynamodb.toString($context.identity.claims.get("custom:company")) )
#set( $file = $context.args.picture.file )
#set( $attribs.file = $util.dynamodb.toS3Object($file.key, $file.bucket, $file.region) )
#set( $attribs.created_at = $util.dynamodb.toString($util.time.nowISO8601()) )
"attributeValues": $util.toJson($attribs)
}
在我的 react native 应用程序中,以下是配置 AWS AppSync 客户端的方法:
Amplify.configure({
Auth: {
mandatorySignIn: true,
region: config.REGION,
userPoolId: config.COGNITO_GROUP_ID,
identityPoolId: config.COGNITO_IDENTITY_ID,
userPoolWebClientId: config.COGNITO_CLIENT_ID,
},
});
const client = new AWSAppSyncClient({
url: config.APPSYNC_URL,
region: config.REGION,
auth: {
type: AUTH_TYPE.AMAZON_COGNITO_USER_POOLS,
jwtToken: async () =>
(await Auth.currentSession()).getIdToken().getJwtToken(),
credentials: () => Auth.currentCredentials(),
},
complexObjectsCredentials: () => Auth.currentCredentials(),
});
最后,这就是我进行突变的方式:
let pickerResult = await ImagePicker.launchCameraAsync({
aspect: [4, 3],
});
const picture = {
ede_number: farm.ede_number,
file: {
localUri: pickerResult.uri,
bucket: config.BUCKET,
key: uuid(),
region: config.REGION,
},
};
addPicture({
variables: {
picture,
},
optimisticResponse: {
__typename: 'Mutation',
addPicture: {
__typename: 'Picture',
...picture,
file: {
__typename: 'S3Object',
...picture.file,
},
},
},
});
在 DynamoDb 表中添加了一个条目,但在 s3 存储桶中没有任何内容:(
当我尝试这个
Auth.currentCredentials().then(cred => console.log(cred));
我在控制台中有以下错误消息:
"cannot get guest credentials when mandatory signin enabled"
我已将我的 cognito 用户添加到具有 S3 完全访问权限的 arn 角色的组中。
我读过这个例子:https ://github.com/aws-samples/aws-amplify-graphql
而且我看不出我的错误在哪里。
谢谢,