"value must be string" error when deploying Smart Contract

[jianhuaixie]

run example return the error like this: {"result":{"result":"value must be string","execute_err":"Deploy: value must be string","estimate_gas":"21873"}}

[ChengOrangeJu]

Hello @jianhuaixie How do you deploy your smart contract? Do you have a screenshot of you operations? That would be very helpful for us to find the problem

[yupnano]

I have reproduce this error when deploying contract with web-wellet, the contract source code is using smart_contract.md#blockchain.

Now we take this smart_contract as an example.

The reason for this error is that I leave the arguments for init empty when deploying it. Then the init function will use default value which is undefined as it's arguments. And when assigning value of undefined to bound properties of smart-contract, a error will be throw out: "value must be string" !

That means for bound properties defined by LocalContractStorage.defineProperty(obj, fieldName, descriptor);, you can not assign it a value of undefined such as: this.fieldName = undefined!

'use strict';

var SampleContract = function () {
    LocalContractStorage.defineProperties(this, {
        name: null,
        count: null
    });
    LocalContractStorage.defineMapProperty(this, "allocation");
};

SampleContract.prototype = {
    init: function (name, count, allocation) {
        this.name = name;
        this.count = count;
        allocation.forEach(function (item) {
            this.allocation.put(item.name, item.count);
        }, this);
        // console.log('init: this.name = ' + this.name);
        // console.log('init: this.count = ' + this.count);
        console.log('init: Blockchain.block.coinbase = ' + Blockchain.block.coinbase);
        console.log('init: Blockchain.block.hash = ' + Blockchain.block.hash);
        console.log('init: Blockchain.block.height = ' + Blockchain.block.height);
        console.log('init: Blockchain.transaction.from = ' + Blockchain.transaction.from);
        console.log('init: Blockchain.transaction.to = ' + Blockchain.transaction.to);
        console.log('init: Blockchain.transaction.value = ' + Blockchain.transaction.value);
        console.log('init: Blockchain.transaction.nonce = ' + Blockchain.transaction.nonce);
        console.log('init: Blockchain.transaction.hash = ' + Blockchain.transaction.hash);
    },
    dump: function () {
        console.log('dump: this.name = ' + this.name);
        console.log('dump: this.count = ' + this.count);
    },
    $dump: function () {
        return this.dump();
    },
    dump_1: function () {
        return this.dump();
    },
    verify: function (expectedName, expectedCount, expectedAllocation) {
        if (!Object.is(this.name, expectedName)) {
            throw new Error("name is not the same, expecting " + expectedName + ", actual is " + this.name + ".");
        }
        if (!Object.is(this.count, expectedCount)) {
            throw new Error("count is not the same, expecting " + expectedCount + ", actual is " + this.count + ".");
        }

        expectedAllocation.forEach(function (expectedItem) {
            var count = this.allocation.get(expectedItem.name);
            if (!Object.is(count, expectedItem.count)) {
                throw new Error("count of " + expectedItem.name + " is not the same, expecting " + expectedItem.count + ", actual is " + count + ".");
            }
        }, this);
    }
};

module.exports = SampleContract;

[weiht12]

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