composer安装yii2-gi失败

Question

我是yii2上的一条新鱼。我得到了一个yii2代码composer，

然后发现没有yii2-gii，

然后我将"yiisoft/yii2-gii": "~2.0.0"添加到composer.json中的require-dev部分，

然后出现composer update和一个错误。

公告：

• 我的操作系统是Windows 10。
• 我已经在我的env上安装了fxp/composer-asset-plugin:~1.1.3。
• 我试过了，yii2 2-requires bower-asset-jquery，同样的错误信息显示。
• 我还尝试了全局安装fxp/composer-asset-plugin:^1.4.1，而不是在我的env上安装~1.1.3，同样的错误信息显示。

错误信息：

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - yiisoft/yii2 2.0.9 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.8 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.7 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.6 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.15.1 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.15 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable |
1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.14.2 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.14.1 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.14 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable |
1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.13.3 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.13.2 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.13.1 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable
| 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.13 requires bower-asset/jquery 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable |
1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.12.2 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.12.1 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.12 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.11.2 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.11.1 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.11 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.10 requires bower-asset/jquery 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable -> no matching package found.
    - Installation request for yiisoft/yii2 ~2.0.6 -> satisfiable by yiisoft/yii2[2.0.10, 2.0.11, 2.0.11.1, 2.0.11.2, 2.0.12, 2.0.12.1, 2.0.12.2, 2.0.13, 2.0.13.1, 2.0.13.2, 2.0.13.3, 2.0.14, 2.0.14.1, 2.0.14.2, 2.0.15, 2.0.15.1, 2.0.6, 2.0.7, 2.0.8, 2.0.9].

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
 - It's a private package and you forgot to add a custom repository to find it

我的问题

• 这个错误是如何发生的？
• 我怎样才能解决这个问题呢？

附加

composer.json

{
    "name": "yiisoft/yii2-app-advanced",
    "description": "Yii 2 Advanced Project Template",
    "keywords": ["yii2", "framework", "advanced", "project template"],
    "homepage": "http://www.yiiframework.com/",
    "type": "project",
    "license": "BSD-3-Clause",
    "support": {
        "issues": "https://github.com/yiisoft/yii2/issues?state=open",
        "forum": "http://www.yiiframework.com/forum/",
        "wiki": "http://www.yiiframework.com/wiki/",
        "irc": "irc://irc.freenode.net/yii",
        "source": "https://github.com/yiisoft/yii2"
    },
    "minimum-stability": "stable",
    "require": {
        "php": ">=5.4.0",
        "yiisoft/yii2": "~2.0.6",
        "yiisoft/yii2-bootstrap": "~2.0.0",
        "yiisoft/yii2-swiftmailer": "~2.0.0 || ~2.1.0"
    },
    "require-dev": {
        "yiisoft/yii2-gii": "~2.0.0",
        "yiisoft/yii2-debug": "~2.0.0",
        "yiisoft/yii2-faker": "~2.0.0",
        "codeception/base": "^2.2.3",
        "codeception/verify": "~0.3.1"
    },
    "config": {
        "process-timeout": 1800,
        "fxp-asset": {
            "enabled": false
        }
    },
    "repositories": {
        "packagist": {
            "type": "composer",
            "url": "https://packagist.phpcomposer.com"
        }
    }
}

Answer 1

您已经显式禁用了fxp/composer-asset-plugin

"fxp-asset": {
    "enabled": false
}

您应该将其更改为true或使用资产包装商。