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  2. github.com/google/guava

    android/guava/src/com/google/common/util/concurrent/ExecutionSequencer.java 

     * the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.util.concurrent.ExecutionSequencer.RunningState.CANCELLED;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Thu Feb 01 21:46:34 UTC 2024
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  3. github.com/tiangolo/fastapi

    docs/zh/docs/tutorial/sql-databases.md 

    {!../../docs_src/sql_databases/sql_app/database.py!}
```

### 创建一个`Base`类

现在我们将使用`declarative_base()`返回一个类。

稍后我们将继承这个类，来创建每个数据库模型或类（ORM 模型）：

```Python hl_lines="13"
{!../../docs_src/sql_databases/sql_app/database.py!}
```

## 创建数据库模型

现在让我们看看文件`sql_app/models.py`。

### 用`Base`类来创建 SQLAlchemy 模型

我们将使用我们之前创建的`Base`类来创建 SQLAlchemy 模型。

/// tip
    Registered: Sun Nov 03 07:19:11 UTC 2024
    - Last Modified: Sun Oct 06 20:36:54 UTC 2024
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  4. github.com/codelibs/fess

    src/main/java/org/codelibs/fess/app/web/admin/accesstoken/AdminAccesstokenAction.java 

    import org.codelibs.fess.annotation.Secured;
import org.codelibs.fess.app.pager.AccessTokenPager;
import org.codelibs.fess.app.service.AccessTokenService;
import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.base.FessAdminAction;
import org.codelibs.fess.es.config.exentity.AccessToken;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.util.ComponentUtil;
    Registered: Thu Oct 31 13:40:30 UTC 2024
    - Last Modified: Thu Feb 22 01:53:18 UTC 2024
    - 14.7K bytes
    - Viewed (0)
  5. github.com/codelibs/fess

    src/main/java/org/codelibs/fess/app/web/admin/labeltype/AdminLabeltypeAction.java 

    import org.codelibs.fess.app.pager.LabelTypePager;
import org.codelibs.fess.app.service.LabelTypeService;
import org.codelibs.fess.app.service.RoleTypeService;
import org.codelibs.fess.app.web.CrudMode;
import org.codelibs.fess.app.web.base.FessAdminAction;
import org.codelibs.fess.es.config.exentity.LabelType;
import org.codelibs.fess.helper.PermissionHelper;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.util.ComponentUtil;
    Registered: Thu Oct 31 13:40:30 UTC 2024
    - Last Modified: Thu Feb 22 01:53:18 UTC 2024
    - 15.1K bytes
    - Viewed (0)
  6. github.com/google/guava

    guava-testlib/test/com/google/common/collect/testing/MapTestSuiteBuilderTests.java 

     * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Wed Apr 19 19:24:36 UTC 2023
    - 11.9K bytes
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  7. github.com/google/guava

    guava/src/com/google/common/collect/TreeMultimap.java 

     * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkNotNull;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Sat Mar 09 00:21:17 UTC 2024
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  8. github.com/google/guava

    android/guava-tests/test/com/google/common/cache/PopulatedCachesTest.java 

    import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.DAYS;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.base.Function;
import com.google.common.cache.CacheBuilderFactory.DurationSpec;
import com.google.common.cache.LocalCache.Strength;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Tue Jul 02 18:21:29 UTC 2024
    - 15K bytes
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  9. github.com/google/guava

    guava-tests/test/com/google/common/io/ByteSourceTest.java 

     * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.io;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.io.TestOption.AVAILABLE_ALWAYS_ZERO;
import static com.google.common.io.TestOption.CLOSE_THROWS;
import static com.google.common.io.TestOption.OPEN_THROWS;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Sat Oct 19 00:26:48 UTC 2024
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  10. github.com/google/guava

    android/guava/src/com/google/common/net/InetAddresses.java 

    import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static java.lang.Math.max;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.base.CharMatcher;
import com.google.common.base.MoreObjects;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Sat Oct 19 00:26:48 UTC 2024
    - 47.1K bytes
    - Viewed (0)
  11. github.com/google/guava

    guava/src/com/google/common/base/CharMatcher.java 

     * the License.
 */

package com.google.common.base;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkPositionIndex;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
    Registered: Fri Nov 01 12:43:10 UTC 2024
    - Last Modified: Thu Oct 17 13:00:28 UTC 2024
    - 53.9K bytes
    - Viewed (0)
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