Firestore:按对象属性查询文档 [英] Firestore: Query documents by property of object
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问题描述
我有一个联系人集合，其结构如下:
I've a collection with contacts with a structure like:
name: 'XPTO Company',
emails: {
susan@xpto.com: { name: 'Susan', text: 'manager' },
fred@xpto.com: { name: 'Fred', text: 'marketing' }
}
如何使用电子邮件"susan@xpto.com"检索文档
How do I retrieve documents with email 'susan@xpto.com'
类似的东西:
firebase.firestore().collection('contacts')
.where(new firebase.firestore.FieldPath('emails', email), '==', true).get()
.then(snap => {
})
推荐答案
您可以将保存电子邮件地址的属性id添加到电子邮件对象.并替换为."在电子邮件对象键中带有-"的字符，例如susan@xpto-com，以便您的数据结构如下所示:
You may add a property id that holds the email address to your email object. and replace '.' in email object key with '-', e.g. susan@xpto-com, so that your data structure looks like this:
name: 'XPTO Company',
emails: {
susan@xpto-com: { id: 'susan@xpto.com', name: 'Susan', text: 'manager' },
fred@xpto-com: { id: 'fred@xpto.com', name: 'Fred', text: 'marketing' }
然后，您可以通过以下方式使用电子邮件"susan@xpto.com"来检索文档:
Then you can retrieve documents with email 'susan@xpto.com' in this way:
firebase.firestore().collection('contacts')
.where('emails.susan@xpto-com.id', '==', 'susan@xpto.com').get()
.then(snap => {
})
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