blocks|key|152014|text|您希望使用规则validateUnique。例如，要检查电子邮件地址在UsersTable上是否唯一，请执行以下操作：-|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|152015|public+function+validationDefault(Validator+$validator)
{
++++$validator->add(
++++++++'email',+
++++++++['unique'+=>+[
++++++++++++'rule'+=>+'validateUnique',+
++++++++++++'provider'+=>+'table',+
++++++++++++'message'+=>+'Not+unique']
++++++++]
++++);

++++return+$validator;
}|code-block|syntax|javascript|152016|详细信息可以在the+API+docs中找到。|152017|entityMap|0|LINK|mutability|MUTABLE|url|http://api.cakephp.org/3.0/class-Cake.ORM.Table.html#_validateUnique^0|7|E|Z|A|0|0|7|C|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@$9|11|A|12|1|13]]|E|$]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

You want to use the rule <code>validateUnique</code>. For example, to check an email address is unique on an <code>UsersTable</code>:-

<pre><code>public function validationDefault(Validator $validator)
{
 $validator-&gt;add(
 'email', 
 ['unique' =&gt; [
 'rule' =&gt; 'validateUnique', 
 'provider' =&gt; 'table', 
 'message' =&gt; 'Not unique']
 ]
 );

 return $validator;
}
</code></pre>

Details can be found in <a href="http://api.cakephp.org/3.0/class-Cake.ORM.Table.html#_validateUnique">the API docs</a>.

blocks|key|149804|text|使用manual中所述的应用程序规则。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|149805|entityMap|0|LINK|mutability|MUTABLE|url|http://book.cakephp.org/3.0/en/orm/validation.html#creating-unique-field-rules^0|2|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Use application rules as described in <a href="http://book.cakephp.org/3.0/en/orm/validation.html#creating-unique-field-rules" rel="nofollow">manual</a>.

blocks|key|2881632|text|验证提供程序可以是对象或类名。如果使用类名，则方法必须是静态的。要使用‘default’以外的提供程序，请确保在您的规则中设置provider密钥：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2881633|//+Use+a+rule+from+the+table+provider
$validator->add('title',+'unique',+[
++++'rule'+=>+'uniqueTitle',
++++'provider'+=>+'table'
]);|code-block|syntax|javascript|2881634|有关更多详细信息，请参阅CakePHP3参考书中的Adding+Validation+Providers部分。|2881635|entityMap|0|LINK|mutability|MUTABLE|url|http://book.cakephp.org/3.0/en/core-libraries/validation.html^0|1R|8|0|0|P|R|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Validation providers can be objects, or class names. If a class name is used the methods must be static. To use a provider other than ‘default’, be sure to set the <code>provider</code> key in your rule:

<pre><code>// Use a rule from the table provider
$validator-&gt;add('title', 'unique', [
 'rule' =&gt; 'uniqueTitle',
 'provider' =&gt; 'table'
]);
</code></pre>

For more details, look at the <a href="http://book.cakephp.org/3.0/en/core-libraries/validation.html" rel="nofollow">Adding Validation Providers</a> section in the CakePHP3 reference book.

blocks|key|152056|text|你必须在你的桌子上使用cake的ORM中的规则...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|152057|将此代码添加到UsersTable顶部的名称空间之后|152058|use+Cake\ORM\Rule\IsUnique;|code-block|syntax|javascript|152059|然后通过将规则放在公共函数中来准备应用于您的字段的规则|152060|public+function+buildRules(RulesChecker+$rules){
++++++++$rules->add($rules->isUnique(['email']));
++++++++return+$rules;
++++}|152061|有关RULES的更多信息，请参阅cakephp文档|offset|length|152062|entityMap|0|LINK|mutability|MUTABLE|url|https://book.cakephp.org/3.0/en/orm/validation.html#creating-a-rules-checker^0|0|0|0|0|0|2|5|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

you have to use the rules from cake's ORM on your table...

add this at the top of your UsersTable after your namespace

<pre><code>use Cake\ORM\Rule\IsUnique;
</code></pre>

Then prepare your rule to apply to your field by placing it in a public function

<pre><code>public function buildRules(RulesChecker $rules){
 $rules-&gt;add($rules-&gt;isUnique(['email']));
 return $rules;
 }
</code></pre>

Consult the cakephp documentation for more information about <a href="https://book.cakephp.org/3.0/en/orm/validation.html#creating-a-rules-checker" rel="noreferrer">RULES</a>

blocks|key|2063500|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2063501|请检查这个在cakephp+3.8+go+to+site中的独特验证|blockquote|offset|length|2063502|2063503|2063504|public+function+validationDefault(Validator+$validator)
{
++++$validator->requirePresence('login_id');
++++return+$validator;
}

public+function+buildRules(RulesChecker+$rules)
{
++++$rules->add($rules->isUnique(['login_id'],+'User+already+exist.'));
++++return+$rules;++
}|code-block|syntax|javascript|2063505|entityMap|0|LINK|mutability|MUTABLE|url|http://viralcrews.co.in/2020/01/17/unique-field-validation-in-cake-php-3-8-model/^0|0|I|A|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|U|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|V|7|@]|8|@$D|W|E|X|1|Y]]|9|$]]|$1|F|3|-4|4|5|6|Z|7|@]|8|@]|9|$]]|$1|G|3|-4|4|5|6|10|7|@]|8|@]|9|$]]|$1|H|3|I|4|J|6|11|7|@]|8|@]|9|$K|L]]|$1|M|3|-4|4|5|6|12|7|@]|8|@]|9|$]]]|N|$O|$4|P|Q|R|9|$S|T]]]]

<blockquote>
 Kindly please check this for unique validation in cakephp 3.8
 <a href="http://viralcrews.co.in/2020/01/17/unique-field-validation-in-cake-php-3-8-model/" rel="nofollow noreferrer">go to site</a>
</blockquote>

<pre><code>public function validationDefault(Validator $validator)
{
 $validator-&gt;requirePresence('login_id');
 return $validator;
}

public function buildRules(RulesChecker $rules)
{
 $rules-&gt;add($rules-&gt;isUnique(['login_id'], 'User already exist.'));
 return $rules; 
}
</code></pre>

How do you validate a field is unique in cakephp 3.0? There doesn't appear to be a validation function listed in the API.

Validating fields as unique in cakephp 3.0

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何验证一个字段在cakephp 3.0中是唯一的？API中似乎没有列出验证函数。

问在cakephp 3.0中验证字段是否唯一
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问在cakephp 3.0中验证字段是否唯一EN