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  • json

    import "gorm.io/datatypes"
    
    type UserWithJSON struct {
    	gorm.Model
    	Name       string
    	Attributes datatypes.JSON
    }
    
    DB.Create(&User{
    	Name:       "json-1",
    	Attributes: datatypes.JSON([]byte(`{"name": "jinzhu", "age": 18, "tags": ["tag1", "tag2"], "orgs": {"orga": "orga"}}`)),
    }
    
    // Check JSON has keys
    datatypes.JSONQuery("attributes").HasKey(value, keys...)
    
    db.Find(&user, datatypes.JSONQuery("attributes").HasKey("role"))
    db.Find(&user, datatypes.JSONQuery("attributes").HasKey("orgs", "orga"))
    // MySQL
    // SELECT * FROM `users` WHERE JSON_EXTRACT(`attributes`, '$.role') IS NOT NULL
    // SELECT * FROM `users` WHERE JSON_EXTRACT(`attributes`, '$.orgs.orga') IS NOT NULL
    
    // PostgreSQL
    // SELECT * FROM "user" WHERE "attributes"::jsonb ? 'role'
    // SELECT * FROM "user" WHERE "attributes"::jsonb -> 'orgs' ? 'orga'
    
    
    // Check JSON extract value from keys equal to value
    datatypes.JSONQuery("attributes").Equals(value, keys...)
    
    DB.First(&user, datatypes.JSONQuery("attributes").Equals("jinzhu", "name"))
    DB.First(&user, datatypes.JSONQuery("attributes").Equals("orgb", "orgs", "orgb"))
    // MySQL
    // SELECT * FROM `user` WHERE JSON_EXTRACT(`attributes`, '$.name') = "jinzhu"
    // SELECT * FROM `user` WHERE JSON_EXTRACT(`attributes`, '$.orgs.orgb') = "orgb"
    
    // PostgreSQL
    // SELECT * FROM "user" WHERE json_extract_path_text("attributes"::json,'name') = 'jinzhu'
    // SELECT * FROM "user" WHERE json_extract_path_text("attributes"::json,'orgs','orgb') = 'orgb'
    

     转载:https://github.com/go-gorm/datatypes

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  • 原文地址:https://www.cnblogs.com/ithubb/p/15701586.html
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