GOOD_FAST_HASH_128(Hashing.goodFastHash(128)),
  GOOD_FAST_HASH_256(Hashing.goodFastHash(256)),
  MD5(Hashing.md5()),
  MURMUR3_128(Hashing.murmur3_128()),
  MURMUR3_32(Hashing.murmur3_32()),
  MURMUR3_32_FIXED(Hashing.murmur3_32_fixed()),
  SHA1(Hashing.sha1()),
  SHA256(Hashing.sha256()),
  SHA384(Hashing.sha384()),
  SHA512(Hashing.sha512()),
  SIP_HASH24(Hashing.sipHash24()),
  FARMHASH_FINGERPRINT_64(Hashing.farmHashFingerprint64()),

     1. Build a Gradle distribution with a fixed timestamp and hash it, but never use this distribution.
     2. Build a Gradle distribution with this hash as a version + fixed timestamp -> dogfood-first
     3. Build a Gradle distribution using dogfood-first with this hash as a version + fixed timestamp different from the one above -> dogfood-second

{!../../../docs_src/dependencies/tutorial011.py!}
```

这样就可以**参数化**依赖项，它包含 `checker.fixed_content` 的属性 - `"bar"`。

## 把实例作为依赖项

然后，不要再在 `Depends(checker)` 中使用 `Depends(FixedContentQueryChecker)`， 而是要使用 `checker`，因为依赖项是类实例 - `checker`，不是类。

处理依赖项时，**FastAPI** 以如下方式调用 `checker`：

```Python
checker(q="somequery")
```

……并用*路径操作函数*的参数 `fixed_content_included` 返回依赖项的值：

```Python hl_lines="20"

}

.form-control {
	border-radius: 0px;
}

legend{
	display: none;
}

/* header */

#searchOptions {
	position: fixed;
	z-index: 10;
}

#searchOptions .container {
	width: 500px;
	max-width: 100%;
	height: 100%;
	overflow: auto;
	position: fixed;
	top: 0;
	bottom: 0;
	right: -500px;
	padding-top: 72px;
	padding-bottom: 20px;
	color: #fff;

-navbar-fixed.layout-fixed .wrapper .main-header.text-sm ~ .control-sidebar {\n  top: calc(2.93725rem + 1px);\n}\n\n.layout-navbar-fixed.layout-fixed .wrapper .sidebar {\n  margin-top: calc(3.5rem + 1px);\n}\n\n.text-sm .layout-navbar-fixed.layout-fixed .wrapper .brand-link ~ .sidebar,\n.layout-navbar-fixed.layout-fixed .wrapper .brand-link.text-sm ~ .sidebar {\n  margin-top: calc(2.93725rem + 1px);\n}\n\n.layout-navbar-fixed.layout-fixed.text-sm .wrapper .control-sidebar {\n  top: calc(2.93725rem...

   * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6409434">Sun bug 6409434</a> is fixed.
   * It's unclear whether nulls were to be permitted or forbidden, but presumably the eventual fix
   * will be to permit them, as it seems more likely that code would depend on that behavior than on

    assertEquals(expected.length() == 0 ? -1 : expected.length(), reader.read(buf));
    assertEquals(expected, new String(buf));
    assertFullyRead(reader);

    // read in chunks to fixed array
    reader = new CharSequenceReader(charSequence);
    buf = new char[5];
    StringBuilder builder = new StringBuilder();
    int read;
    while ((read = reader.read(buf, 0, buf.length)) != -1) {

    assertEquals(expected.length() == 0 ? -1 : expected.length(), reader.read(buf));
    assertEquals(expected, new String(buf));
    assertFullyRead(reader);

    // read in chunks to fixed array
    reader = new CharSequenceReader(charSequence);
    buf = new char[5];
    StringBuilder builder = new StringBuilder();
    int read;
    while ((read = reader.read(buf, 0, buf.length)) != -1) {

```

& 👈 🌌 👥 💪 "🔗" 👆 🔗, 👈 🔜 ✔️ `"bar"` 🔘 ⚫️, 🔢 `checker.fixed_content`.

## ⚙️ 👐 🔗

⤴️, 👥 💪 ⚙️ 👉 `checker` `Depends(checker)`, ↩️ `Depends(FixedContentQueryChecker)`, ↩️ 🔗 👐, `checker`, 🚫 🎓 ⚫️.

& 🕐❔ ❎ 🔗, **FastAPI** 🔜 🤙 👉 `checker` 💖:

```Python
checker(q="somequery")
```

...& 🚶‍♀️ ⚫️❔ 👈 📨 💲 🔗 👆 *➡ 🛠️ 🔢* 🔢 `fixed_content_included`:

```Python hl_lines="20"

 * character}, fixed {@linkplain #on(String) string}, {@linkplain #onPattern regular expression} or
 * {@link #on(CharMatcher) CharMatcher} instance. Or, instead of using a separator at all, a
 * splitter can extract adjacent substrings of a given {@linkplain #fixedLength fixed length}.
 *
 * <p>For example, this expression:
 *
 * <pre>{@code