Update for associations
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Jinzhu
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@ -851,7 +851,7 @@ db.SetLogger(log.New(os.Stdout, <span class="hljs-string">"\r\n"</span
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</script>
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</div>
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@ -947,7 +947,7 @@ db.Model(&user).Association(<span class="hljs-string">"Languages"<
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</script>
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</div>
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@ -788,7 +788,7 @@ If you want to use those changes in your callbacks, you need to run your SQL in
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</script>
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</div>
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@ -758,7 +758,7 @@
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<script>
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</script>
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</div>
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43
crud.html
43
crud.html
@ -1230,7 +1230,8 @@ db.Unscoped().Delete(&order)
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<span class="hljs-comment">//// DELETE FROM orders WHERE id=10;</span>
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</code></pre>
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<h2 id="associations">Associations</h2>
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<p>By default when creating/updating a record, GORM will save its associations, if the association has primary key, GORM will call <code>Update</code> to save it, otherwise it will be created.</p>
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<p>By default when creating/updating a record, GORM will save its associations and its reference.
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If the association has a primary key already, GORM will call <code>Update</code> to save it, otherwise it will be created.</p>
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<pre><code class="lang-go">user := User{
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Name: <span class="hljs-string">"jinzhu"</span>,
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BillingAddress: Address{Address1: <span class="hljs-string">"Billing Address - Address 1"</span>},
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@ -1261,25 +1262,53 @@ db.Create(&user)
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db.Save(&user)
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</code></pre>
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<p>Refer <a href="associations.html">Associations</a> for more details</p>
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<h3 id="skip-save-associations-when-creatingupdating">Skip Save Associations when creating/updating</h3>
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<h3 id="skip-auto-save-associations-when-creatingupdating">Skip Auto Save Associations when creating/updating</h3>
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<p>By default when saving an record, GORM will save its associations also, you could skip it by set <code>gorm:save_associations</code> to <code>false</code></p>
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<pre><code class="lang-go">db.Set(<span class="hljs-string">"gorm:save_associations"</span>, <span class="hljs-literal">false</span>).Create(&user)
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<pre><code class="lang-go"><span class="hljs-comment">// Disable update associations with primary key, will update reference</span>
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db.Set(<span class="hljs-string">"gorm:association_autoupdate"</span>, <span class="hljs-literal">false</span>).Create(&user)
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db.Set(<span class="hljs-string">"gorm:association_autoupdate"</span>, <span class="hljs-literal">false</span>).Save(&user)
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<span class="hljs-comment">// Disable create associations w/o primary key, will update reference for records have primary key</span>
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db.Set(<span class="hljs-string">"gorm:association_autocreate"</span>, <span class="hljs-literal">false</span>).Create(&user)
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db.Set(<span class="hljs-string">"gorm:association_autocreate"</span>, <span class="hljs-literal">false</span>).Save(&user)
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<span class="hljs-comment">// Disable auto update/create associations, will update reference for records have primary key</span>
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db.Set(<span class="hljs-string">"gorm:save_associations"</span>, <span class="hljs-literal">false</span>).Create(&user)
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db.Set(<span class="hljs-string">"gorm:save_associations"</span>, <span class="hljs-literal">false</span>).Save(&user)
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</code></pre>
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<h3 id="skip-save-associations-by-tag">Skip Save Associations by Tag</h3>
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<p>You could use Tag to config your struct to never save an association when creating/updating</p>
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<pre><code class="lang-go"><span class="hljs-keyword">type</span> User <span class="hljs-keyword">struct</span> {
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gorm.Model
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Name <span class="hljs-keyword">string</span>
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CompanyID <span class="hljs-keyword">uint</span>
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Company Company <span class="hljs-string">`gorm:"save_associations:false"`</span>
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Name <span class="hljs-keyword">string</span>
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CompanyID <span class="hljs-keyword">uint</span>
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<span class="hljs-comment">// Disable auto upate/create associations, will update reference for records have primary key</span>
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Company Company <span class="hljs-string">`gorm:"save_associations:false"`</span>
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<span class="hljs-comment">// Disable create associations w/0 primary key, will update reference for records have primary key</span>
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Company1 Company <span class="hljs-string">`gorm:"association_autocreate:false"`</span>
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<span class="hljs-comment">// Disable auto creating associations w/o primary key, will update reference for records have primary key</span>
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Company2 Company <span class="hljs-string">`gorm:"association_autoupdate:false"`</span>
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<span class="hljs-comment">// Disable autoupdate and autocreate associations, will update reference for records have primary key</span>
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Company3 Company <span class="hljs-string">`gorm:"association_autoupdate:false;association_autocreate:false"`</span>
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}
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<span class="hljs-keyword">type</span> Company <span class="hljs-keyword">struct</span> {
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gorm.Model
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Name <span class="hljs-keyword">string</span>
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}
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</code></pre>
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<h3 id="skip-save-reference">Skip Save Reference</h3>
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<p>If you don't even want to save association's reference when updating/saving data, you could use below tricks</p>
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<pre><code class="lang-go">db.Set(<span class="hljs-string">"gorm:association_save_reference"</span>, <span class="hljs-literal">false</span>).Save(&user)
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db.Set(<span class="hljs-string">"gorm:association_save_reference"</span>, <span class="hljs-literal">false</span>).Create(&user)
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</code></pre>
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<p>or use tag</p>
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<pre><code class="lang-go"><span class="hljs-keyword">type</span> User <span class="hljs-keyword">struct</span> {
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gorm.Model
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Name <span class="hljs-keyword">string</span>
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CompanyID <span class="hljs-keyword">uint</span>
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Company Company <span class="hljs-string">`gorm:"association_save_reference:false"`</span>
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}
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</code></pre>
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@ -1324,7 +1353,7 @@ db.Set(<span class="hljs-string">"gorm:save_associations"</span>, <spa
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|
||||
});
|
||||
</script>
|
||||
</div>
|
||||
|
||||
@ -845,7 +845,7 @@ db.Model(&User{}).RemoveIndex(<span class="hljs-string">"idx_user_name&
|
||||
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|
||||
var gitbook = gitbook || [];
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||||
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|
||||
});
|
||||
</script>
|
||||
</div>
|
||||
|
||||
@ -791,7 +791,7 @@ db.Callback().RowQuery().Register(<span class="hljs-string">"publish:update
|
||||
<script>
|
||||
var gitbook = gitbook || [];
|
||||
gitbook.push(function() {
|
||||
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|
||||
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|
||||
});
|
||||
</script>
|
||||
</div>
|
||||
|
||||
@ -765,7 +765,7 @@ fmt.Println(<span class="hljs-string">"Inserted fields are as expected:&quo
|
||||
<script>
|
||||
var gitbook = gitbook || [];
|
||||
gitbook.push(function() {
|
||||
gitbook.page.hasChanged({"page":{"title":"Dialect Specific Data Type","level":"1.3.4","depth":2,"next":{"title":"CRUD: Reading and Writing Data","level":"1.4","depth":1,"path":"crud.md","ref":"crud.md","articles":[{"title":"Create","level":"1.4.1","depth":2,"anchor":"#create","path":"crud.md","ref":"crud.md#create","articles":[]},{"title":"Query","level":"1.4.2","depth":2,"anchor":"#query","path":"crud.md","ref":"crud.md#query","articles":[]},{"title":"Preloading (Eager Loading)","level":"1.4.3","depth":2,"anchor":"#preloading-eager-loading","path":"crud.md","ref":"crud.md#preloading-eager-loading","articles":[]},{"title":"Update","level":"1.4.4","depth":2,"anchor":"#update","path":"crud.md","ref":"crud.md#update","articles":[]},{"title":"Delete / Soft Delete","level":"1.4.5","depth":2,"anchor":"#delete","path":"crud.md","ref":"crud.md#delete","articles":[]},{"title":"Associations","level":"1.4.6","depth":2,"anchor":"#associations","path":"crud.md","ref":"crud.md#associations","articles":[]}]},"previous":{"title":"Association Mode","level":"1.3.3.6","depth":3,"anchor":"#association-mode","path":"associations.md","ref":"associations.md#association-mode","articles":[]},"dir":"ltr"},"config":{"plugins":["github","edit-link"],"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"fontsettings":{"theme":"night","family":"sans","size":2},"github":{"url":"https://github.com/jinzhu/gorm"},"edit-link":{"label":"Edit This Page","base":"https://github.com/jinzhu/gorm/edit/gh-pages/documents/"},"highlight":{},"search":{},"lunr":{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false}},"theme":"default","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{},"title":"GORM Guide","gitbook":"*"},"file":{"path":"dialects.md","mtime":"2018-02-09T00:17:38.563Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2018-02-09T00:19:45.327Z"},"basePath":".","book":{"language":""}});
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||||
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|
||||
});
|
||||
</script>
|
||||
</div>
|
||||
|
||||
@ -722,7 +722,8 @@ db.Unscoped().Delete(&order)
|
||||
|
||||
## Associations
|
||||
|
||||
By default when creating/updating a record, GORM will save its associations, if the association has primary key, GORM will call `Update` to save it, otherwise it will be created.
|
||||
By default when creating/updating a record, GORM will save its associations and its reference.
|
||||
If the association has a primary key already, GORM will call `Update` to save it, otherwise it will be created.
|
||||
|
||||
```go
|
||||
user := User{
|
||||
@ -757,13 +758,21 @@ db.Save(&user)
|
||||
|
||||
Refer [Associations](associations.html) for more details
|
||||
|
||||
### Skip Save Associations when creating/updating
|
||||
### Skip Auto Save Associations when creating/updating
|
||||
|
||||
By default when saving an record, GORM will save its associations also, you could skip it by set `gorm:save_associations` to `false`
|
||||
|
||||
```go
|
||||
db.Set("gorm:save_associations", false).Create(&user)
|
||||
// Disable update associations with primary key, will update reference
|
||||
db.Set("gorm:association_autoupdate", false).Create(&user)
|
||||
db.Set("gorm:association_autoupdate", false).Save(&user)
|
||||
|
||||
// Disable create associations w/o primary key, will update reference for records have primary key
|
||||
db.Set("gorm:association_autocreate", false).Create(&user)
|
||||
db.Set("gorm:association_autocreate", false).Save(&user)
|
||||
|
||||
// Disable auto update/create associations, will update reference for records have primary key
|
||||
db.Set("gorm:save_associations", false).Create(&user)
|
||||
db.Set("gorm:save_associations", false).Save(&user)
|
||||
```
|
||||
|
||||
@ -774,9 +783,16 @@ You could use Tag to config your struct to never save an association when creati
|
||||
```go
|
||||
type User struct {
|
||||
gorm.Model
|
||||
Name string
|
||||
CompanyID uint
|
||||
Company Company `gorm:"save_associations:false"`
|
||||
Name string
|
||||
CompanyID uint
|
||||
// Disable auto upate/create associations, will update reference for records have primary key
|
||||
Company Company `gorm:"save_associations:false"`
|
||||
// Disable create associations w/0 primary key, will update reference for records have primary key
|
||||
Company1 Company `gorm:"association_autocreate:false"`
|
||||
// Disable auto creating associations w/o primary key, will update reference for records have primary key
|
||||
Company2 Company `gorm:"association_autoupdate:false"`
|
||||
// Disable autoupdate and autocreate associations, will update reference for records have primary key
|
||||
Company3 Company `gorm:"association_autoupdate:false;association_autocreate:false"`
|
||||
}
|
||||
|
||||
type Company struct {
|
||||
@ -784,3 +800,23 @@ type Company struct {
|
||||
Name string
|
||||
}
|
||||
```
|
||||
|
||||
### Skip Save Reference
|
||||
|
||||
If you don't even want to save association's reference when updating/saving data, you could use below tricks
|
||||
|
||||
```go
|
||||
db.Set("gorm:association_save_reference", false).Save(&user)
|
||||
db.Set("gorm:association_save_reference", false).Create(&user)
|
||||
```
|
||||
|
||||
or use tag
|
||||
|
||||
```go
|
||||
type User struct {
|
||||
gorm.Model
|
||||
Name string
|
||||
CompanyID uint
|
||||
Company Company `gorm:"association_save_reference:false"`
|
||||
}
|
||||
```
|
||||
|
||||
@ -789,7 +789,7 @@
|
||||
<script>
|
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var gitbook = gitbook || [];
|
||||
gitbook.push(function() {
|
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|
||||
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|
||||
|
||||
@ -857,7 +857,7 @@ db.Model(&user).Update(<span class="hljs-string">"name"</span>, <s
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|
||||
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|
||||
</div>
|
||||
|
||||
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Reference in New Issue
Block a user