无法从超级账本结构getStateByRange和getStateByPartialCompositeKey获得响应 [英] Trouble getting response from hyperledger fabric getStateByRange and getStateByPartialCompositeKey

问题描述

我很难从这种方法中得到答案，没有办法，我只能在迭代器中获得最终完成的对象，而没有其他对象.我肯定知道区块链中有对象，我可以使用getState方法获取它们.

I'm having trouble getting an answer from this methods, no mather what I do I only get the final done object in the iterator with no other objects. I know for sure there are objects in the blockchain, I can get them using the getState method.

这是我的getStateByPartialCompositeKey代码:

This is my code for the getStateByPartialCompositeKey:

public async getStatesByPartialKey(className: string, key: string): Promise<any> {
    const states = [];
    const datas = [];
    const iterator = await this.ctx.stub.getStateByPartialCompositeKey(className, [key]);

    while (true) {
        const data = await iterator.next();
        datas.push(data);

        if (data.value && data.value.value.toString()) {
            const state = State.deserialize(data.value.value, this.supportedClasses);
            states.push(state);
        }
        if (data.done) {
            await iterator.close();
            return datas;
        }
    }
}

这是我的getStateByRange方法代码:

This is my code for the getStateByRange method:

public async getStatesByRange(startKey: string, endKey: string): Promise<any> {
    const states = [];
    const datas = [];
    const iterator = await this.ctx.stub.getStateByRange(startKey, endKey);

    while (true) {
        const data = await iterator.next();
        datas.push(data);

        if (data.value && data.value.value.toString()) {
            const state = State.deserialize(data.value.value, this.supportedClasses);
            states.push(state);
        }
        if (data.done) {
            await iterator.close();
            return datas;
        }
    }
}

这是我在区块链中拥有的对象之一:

This is one of the objects I have in the blockchain:

{
    "class":"com.example.state",
    "key":"\"COMPANY1\":\"1f5ee25d-546e-46d2-96cd-f7b7a347f84f\"",
    "currentState":1,
    "id":"1f5ee25d-546e-46d2-96cd-f7b7a347f84f",
    "issuer":"COMPANY1"
}

这就是我使用它们的方式:

This is how I'm using them:

getStatesByPartialKey('com.example.state', 'COMPANY1');
getStatesByRange('COMPANY0', 'COMPANYz');

这是我得到的唯一答案:

This is the only answer I'm getting:

[{"done":true}]

我做错了什么?我正在使用"fabric-shim":"^ 1.2.0".

What am I doing wrong? I'm using "fabric-shim": "^1.2.0".

谢谢

推荐答案

我遇到的问题是创建密钥，我使用的是stub.createCompositeKey，但是它在密钥的开头创建了带有u0000字符的密钥，并且方法stub.getStateByRange找不到任何东西，即使我正在寻找stub.createCompositeKey方法覆盖的范围.

The problem I had was creating the keys, I was using the stub.createCompositeKey but it was creating the keys with a u0000 character at the begining of the key and the method stub.getStateByRange couldn't find anything, even when I looked for a range creaded with the stub.createCompositeKey method.

我不得不改变创建密钥的方式，然后我开始查找记录.

I had to change the way I create the keys and then I started to find my records.

谢谢

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