如何在Go中生成嵌套JSON响应？
我是新手，需要一些帮助 在我的PostgreSQL数据库中，我有4个表。他们称之为：如何在Go中生成嵌套JSON响应？,json,postgresql,go,go-gorm,Json,Postgresql,Go,Go Gorm,我是新手，需要一些帮助 在我的PostgreSQL数据库中，我有4个表。他们称之为：调查，问题，选项和调查问题 它们看起来像这样： [ { "survey_id": "0cf1cf18-d5fd-474e-a8be-754fbdc89720", "survey_name": "April", "questions": [ { "question_id": 1,
调查问题选项调查问题[
{
"survey_id": "0cf1cf18-d5fd-474e-a8be-754fbdc89720",
"survey_name": "April",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 1,
"option_text": "red"
},
{
"option_id": 2,
"option_text": "blue"
},
{
"option_id": 3,
"option_text": "grey"
},
]
}
]
},
{
"survey_id": "b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720",
"survey_name": "May",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 3,
"option_text": "grey"
},
{
"option_id": 4,
"option_text": "green"
},
{
"option_id": 5,
"option_text": "brown"
},
]
}
]
}
]
type Survey struct {
SurveyID string `gorm:"primary_key" json:"survey_id"`
SurveyName string `gorm:"not null" json:"survey_name"`
Questions []Question
}
type Question struct {
QuestionID int `gorm:"primary_key" json:"question_id"`
QuestionText string `gorm:"not null;unique" json:"question_text"`
Options []Option
}
type Option struct {
OptionID int `gorm:"primary_key" json:"option_id"`
OptionText string `gorm:"not null;unique" json:"option_text"`
}
调查| survey_id (uuid4) | survey_name (varchar) |
|--------------------------------------|-----------------------|
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | April |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | May |
| question_id (int) | question_text (text) |
|-------------------|------------------------------|
| 1 | What is your favorite color? |
| option_id (int) | option_text (text) |
|-------------------|--------------------|
| 1 | red |
| 2 | blue |
| 3 | grey |
| 4 | green |
| 5 | brown |
问题| survey_id (uuid4) | survey_name (varchar) |
|--------------------------------------|-----------------------|
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | April |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | May |
| question_id (int) | question_text (text) |
|-------------------|------------------------------|
| 1 | What is your favorite color? |
| option_id (int) | option_text (text) |
|-------------------|--------------------|
| 1 | red |
| 2 | blue |
| 3 | grey |
| 4 | green |
| 5 | brown |
选项| survey_id (uuid4) | survey_name (varchar) |
|--------------------------------------|-----------------------|
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | April |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | May |
| question_id (int) | question_text (text) |
|-------------------|------------------------------|
| 1 | What is your favorite color? |
| option_id (int) | option_text (text) |
|-------------------|--------------------|
| 1 | red |
| 2 | blue |
| 3 | grey |
| 4 | green |
| 5 | brown |
surveys\u questions\u options| survey_id | question_id | option_id |
|--------------------------------------|-------------|-----------|
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | 1 | 1 |
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | 1 | 2 |
| 0cf1cf18-d5fd-474e-a8be-754fbdc89720 | 1 | 3 |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | 1 | 3 |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | 1 | 4 |
| b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720 | 1 | 5 |
[
{
"survey_id": "0cf1cf18-d5fd-474e-a8be-754fbdc89720",
"survey_name": "April",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 1,
"option_text": "red"
},
{
"option_id": 2,
"option_text": "blue"
},
{
"option_id": 3,
"option_text": "grey"
},
]
}
]
},
{
"survey_id": "b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720",
"survey_name": "May",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 3,
"option_text": "grey"
},
{
"option_id": 4,
"option_text": "green"
},
{
"option_id": 5,
"option_text": "brown"
},
]
}
]
}
]
type Survey struct {
SurveyID string `gorm:"primary_key" json:"survey_id"`
SurveyName string `gorm:"not null" json:"survey_name"`
Questions []Question
}
type Question struct {
QuestionID int `gorm:"primary_key" json:"question_id"`
QuestionText string `gorm:"not null;unique" json:"question_text"`
Options []Option
}
type Option struct {
OptionID int `gorm:"primary_key" json:"option_id"`
OptionText string `gorm:"not null;unique" json:"option_text"`
}
[
{
"survey_id": "0cf1cf18-d5fd-474e-a8be-754fbdc89720",
"survey_name": "April",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 1,
"option_text": "red"
},
{
"option_id": 2,
"option_text": "blue"
},
{
"option_id": 3,
"option_text": "grey"
},
]
}
]
},
{
"survey_id": "b9fg55d9-n5fy-s7fe-s5bh-856fbdc89720",
"survey_name": "May",
"questions": [
{
"question_id": 1,
"question_text": "What is your favorite color?",
"options": [
{
"option_id": 3,
"option_text": "grey"
},
{
"option_id": 4,
"option_text": "green"
},
{
"option_id": 5,
"option_text": "brown"
},
]
}
]
}
]
type Survey struct {
SurveyID string `gorm:"primary_key" json:"survey_id"`
SurveyName string `gorm:"not null" json:"survey_name"`
Questions []Question
}
type Question struct {
QuestionID int `gorm:"primary_key" json:"question_id"`
QuestionText string `gorm:"not null;unique" json:"question_text"`
Options []Option
}
type Option struct {
OptionID int `gorm:"primary_key" json:"option_id"`
OptionText string `gorm:"not null;unique" json:"option_text"`
}
我不确定GORM部分，但对于JSON，您还需要在嵌套对象上添加结构标记：
type Survey struct {
...
Questions []Question `json:"questions"`
}
type Question struct {
...
Options []Option `json:"options"`
}
我不确定GORM部分，但对于JSON，您还需要在嵌套对象上添加结构标记：
type Survey struct {
...
Questions []Question `json:"questions"`
}
type Question struct {
...
Options []Option `json:"options"`
}
我们在您的代码中缺少一些作用域，因此很难为您指出正确的方向。您是询问查询GORM以便获得
[]调查[]调查[]调查[]调查type Survey struct {
gorm.Model
SurveyID string `gorm:"primary_key" json:"survey_id"`
SurveyName string `gorm:"not null" json:"survey_name"`
Questions []*Question `gorm:"many2many:survey_questions;"`
}
surveys := []*model.Survey{}
db := dbSession.Where(&model.Survey{SurveyID: id}).Preload("Questions").Find(&surveys)
type Survey struct {
gorm.Model
SurveyID string `gorm:"primary_key" json:"survey_id"`
SurveyName string `gorm:"not null" json:"survey_name"`
Questions []*Question `gorm:"many2many:survey_questions;"`
}
surveys := []*model.Survey{}
db := dbSession.Where(&model.Survey{SurveyID: id}).Preload("Questions").Find(&surveys)
你想在哪里解决这个问题？@Tinwor你好！首先，我需要正确的方向。你认为我的模型（结构）正确吗？第二，我是否需要struct来维持我的表？如果我的模型是正确的，我如何在处理程序中正确使用它们来创建乏味的JSON响应。如果可能，需要一些示例。如果封送嵌套结构，它将生成嵌套JSON。您的问题具体是什么？为
问题添加相关标签选项调查问题添加相关标签选项调查SURVEYS\u QUESTIONS\u OPTIONSSURVEYS\u QUESTIONS\u OPTIONS