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Jinzhu 2017-03-17 17:21:06 +08:00
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advanced.html
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@ -836,7 +836,7 @@ db.SetLogger(log.New(os.Stdout, <span class="hljs-string">&quot;\r\n&quot;</span
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19
associations.html
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@ -802,6 +802,23 @@ db.Model(&amp;user).Related(&amp;emails)
db.Model(&amp;user).Related(&amp;languages, <span class="hljs-string">&quot;Languages&quot;</span>)
<span class="hljs-comment">//// SELECT * FROM &quot;languages&quot; INNER JOIN &quot;user_languages&quot; ON &quot;user_languages&quot;.&quot;language_id&quot; = &quot;languages&quot;.&quot;id&quot; WHERE &quot;user_languages&quot;.&quot;user_id&quot; = 111</span>
</code></pre>
<p>*With back-reference :</p>
<pre><code class="lang-go"><span class="hljs-comment">// User has and belongs to many languages, use `user_languages` as join table</span>
<span class="hljs-comment">// Make sure the two models are in different files</span>
<span class="hljs-keyword">type</span> User <span class="hljs-keyword">struct</span> {
gorm.Model
Languages []Language <span class="hljs-string">`gorm:&quot;many2many:user_languages;&quot;`</span>
}
<span class="hljs-keyword">type</span> Language <span class="hljs-keyword">struct</span> {
gorm.Model
Name <span class="hljs-keyword">string</span>
Users []User <span class="hljs-string">`gorm:&quot;many2many:user_languages;&quot;`</span>
}
db.Model(&amp;language).Related(&amp;users)
<span class="hljs-comment">//// SELECT * FROM &quot;users&quot; INNER JOIN &quot;user_languages&quot; ON &quot;user_languages&quot;.&quot;user_id&quot; = &quot;users&quot;.&quot;id&quot; WHERE (&quot;user_languages&quot;.&quot;language_id&quot; IN (&apos;111&apos;))</span>
</code></pre>
<p><em>Specify Foreign Key &amp; Association Key</em></p>
<pre><code class="lang-go"><span class="hljs-keyword">type</span> CustomizePerson <span class="hljs-keyword">struct</span> {
IdPerson <span class="hljs-keyword">string</span> <span class="hljs-string">`gorm:&quot;primary_key:true&quot;`</span>
@ -915,7 +932,7 @@ db.Model(&amp;user).Association(<span class="hljs-string">&quot;Languages&quot;<
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2
callbacks.html
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@ -773,7 +773,7 @@ If you want to use those changes in your callbacks, you need to run your SQL in
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changelog.html
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@ -743,7 +743,7 @@
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2
crud.html
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@ -1305,7 +1305,7 @@ db.Set(<span class="hljs-string">&quot;gorm:save_associations&quot;</span>, <spa
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2
database.html
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@ -818,7 +818,7 @@ db.Model(&amp;User{}).RemoveIndex(<span class="hljs-string">&quot;idx_user_name&
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development.html
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@ -772,7 +772,7 @@ db.Callback().RowQuery().Register(<span class="hljs-string">&quot;publish:update
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2
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9
models.html
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@ -792,9 +792,10 @@ db.Model(&amp;user).Update(<span class="hljs-string">&quot;CreatedAt&quot;</span
</code></pre>
<h3 id="use-updatedat-used-to-store-records-updated-time">Use <code>UpdatedAt</code> used to store record&apos;s updated time</h3>
<p>Save records having <code>UpdatedAt</code> field will set it to current time.</p>
<pre><code class="lang-go">db.Save(&amp;user) <span class="hljs-comment">// will set `UpdatedAt` to current time</span>
db.Model(&amp;user).Update(<span class="hljs-string">&quot;name&quot;</span>, <span class="hljs-string">&quot;jinzhu&quot;</span>) <span class="hljs-comment">// will set `UpdatedAt` to current time</span>
</code></pre>
<p><code>``go
// Whenever one or more</code>user<code>fields are edited using Save() or Update(),</code>UpdatedAt<code>will be set to current time
db.Save(&amp;user) // will set</code>UpdatedAt<code>to current time
db.Model(&amp;user).Update(&quot;name&quot;, &quot;jinzhu&quot;) // will set</code>UpdatedAt` to current time </p>
<h3 id="use-deletedat-to-store-records-deleted-time-if-field-exists">Use <code>DeletedAt</code> to store record&apos;s deleted time if field exists</h3>
<p>Delete records having <code>DeletedAt</code> field, it won&apos;t be deleted from database, but only set field <code>DeletedAt</code>&apos;s value to current time, and the record is not findable when querying, refer <a href="crud.html#soft-delete">Soft Delete</a></p>
@ -840,7 +841,7 @@ db.Model(&amp;user).Update(<span class="hljs-string">&quot;name&quot;</span>, <s
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