我的rails应用程序中有两个表：用户表和活动表。用户有很多活动。现在，我试图找出如何打印活动名称，其中activity_type =：personal AND where user_id = current_user.id。
在我的活动索引文件中，我有以下内容：
Ext.application({
name : 'Fiddle',
launch : function() {
Ext.create('Ext.form.Panel', {
title: 'On The Wall',
width: 300,
bodyPadding: 10,
renderTo: Ext.getBody(),
items: [{
xtype: 'numberfield',
anchor: '100%',
name: 'bottles',
fieldLabel: 'Bottles of Beer',
value: 99,
maxValue: 99,
minValue: 0,
allowExponential: false,
allowDecimals: true
}],
buttons: [{
text: 'Take one down, pass it around',
handler: function() {
this.up('form').down('[name=bottles]').spinDown();
}
}]
});
}
});
页面上没有打印出来 - 我肯定已将用户和活动添加到数据库中，因为我已经检查了rails consoler。我是否错误地设置了每个do循环？有没有不同的方法来查询这些数据？
答案 0 :(得分：0)
应该这样写：
<% @activities.where(user_id: current_user.id, activity_type: "personal").each do |activity| %>
<%= activity.activity_name %>
<% end %>
或者更好，因为用户has_many活动：
<% current_user.activities.where(activity_type: "personal").each do |activity| %>
<%= activity.activity_name %>
<% end %>
我们可以使用范围进一步压缩它：
class Activity < ActiveRecord::Base
def self.personal
where(activity_type: "personal")
end
end
在控制器中：
def index # or whatever you wnat
@activities = current_user.activities.personal
end
观点：
<% @activities.each do |activity| %>
<%= activity.activity_name %>
<% end %>
答案 1 :(得分：0)
如果您有用户的活动关联，您应该可以执行类似
的操作ShapeData ObjectGenerator::makeAngularSpringMass(glm::vec3 anchorPosition, GLfloat springWidth, GLfloat stretch, GLfloat width, GLfloat height, GLfloat angle) {
ShapeData ret;
angle = glm::radians(angle);
glm::vec3 springColor{ 1.0f, 0.0f, 0.0f }, massColor{ 0.0f, 1.0f, 0.0f }, connectionPoint{ anchorPosition.x, anchorPosition.y - (17 * stretch), 0.0f };
//The original model
Vertex springMass[] = {
glm::vec3(anchorPosition.x, anchorPosition.y, 0.0f), // 0
springColor,
glm::vec3(anchorPosition.x, anchorPosition.y - (0.1 *stretch),0.0f), // 1
springColor,
glm::vec3(anchorPosition.x + springWidth, anchorPosition.y - (1 * stretch), 0.0f), // 2
springColor,
glm::vec3(anchorPosition.x - springWidth, anchorPosition.y - (3 * stretch), 0.0f), // 3
springColor,
glm::vec3(anchorPosition.x + springWidth, anchorPosition.y - (5 * stretch), 0.0f), // 4
springColor,
glm::vec3(anchorPosition.x - springWidth, anchorPosition.y - (7 * stretch), 0.0f), // 5
springColor,
glm::vec3(anchorPosition.x + springWidth, anchorPosition.y - (9 * stretch), 0.0f), // 6
springColor,
glm::vec3(anchorPosition.x - springWidth, anchorPosition.y - (11 * stretch), 0.0f), // 7
springColor,
glm::vec3(anchorPosition.x + springWidth, anchorPosition.y - (13 * stretch), 0.0f), // 8
springColor,
glm::vec3(anchorPosition.x - springWidth, anchorPosition.y - (15 * stretch), 0.0f), // 9
springColor,
glm::vec3(anchorPosition.x, anchorPosition.y - (16 * stretch), 0.0f), // 10
springColor,
connectionPoint, // 11
springColor,
//=================Mass==============//
glm::vec3(connectionPoint.x - width, connectionPoint.y, 0.0f), //top Left 12
massColor,
glm::vec3(connectionPoint.x + width, connectionPoint.y, 0.0f), //top Right 13
massColor,
glm::vec3(connectionPoint.x + width, connectionPoint.y - height, 0.0f), // bottom right 14
massColor,
glm::vec3(connectionPoint.x - width, connectionPoint.y - height, 0.0f), // bottom left 15
massColor,
};
//New vertices recomputed around anchorPosition
Vertex vertices[] = {
glm::vec3(anchorPosition.x, anchorPosition.y, 0.0f), // 0
springColor,
glm::vec3(getRotatedX(angle, springMass[1], anchorPosition), getRotatedY(angle, springMass[1], anchorPosition), 0.0f), // 1
springColor,
glm::vec3(getRotatedX(angle, springMass[2], anchorPosition), getRotatedY(angle, springMass[2], anchorPosition), 0.0f), // 2
springColor,
glm::vec3(getRotatedX(angle, springMass[3], anchorPosition), getRotatedY(angle, springMass[3], anchorPosition), 0.0f), // 3
springColor,
glm::vec3(getRotatedX(angle, springMass[4], anchorPosition), getRotatedY(angle, springMass[4], anchorPosition), 0.0f), // 4
springColor,
glm::vec3(getRotatedX(angle, springMass[5], anchorPosition), getRotatedY(angle, springMass[5], anchorPosition), 0.0f), // 5
springColor,
glm::vec3(getRotatedX(angle, springMass[6], anchorPosition), getRotatedY(angle, springMass[6], anchorPosition), 0.0f), // 6
springColor,
glm::vec3(getRotatedX(angle, springMass[7], anchorPosition), getRotatedY(angle, springMass[7], anchorPosition), 0.0f), // 7
springColor,
glm::vec3(getRotatedX(angle, springMass[8], anchorPosition), getRotatedY(angle, springMass[8], anchorPosition), 0.0f), // 8
springColor,
glm::vec3(getRotatedX(angle, springMass[9], anchorPosition), getRotatedY(angle, springMass[9], anchorPosition), 0.0f), // 9
springColor,
glm::vec3(getRotatedX(angle, springMass[10], anchorPosition), getRotatedY(angle, springMass[10], anchorPosition), 0.0f), // 10
springColor,
glm::vec3(getRotatedX(angle, springMass[11], anchorPosition), getRotatedY(angle, springMass[11], anchorPosition), 0.0f), // 11
springColor,
//=================Mass==============//
glm::vec3(getRotatedX(angle, springMass[12], anchorPosition), getRotatedY(angle, springMass[12], anchorPosition), 0.0f), // 12
massColor,
glm::vec3(getRotatedX(angle, springMass[13], anchorPosition), getRotatedY(angle, springMass[13], anchorPosition), 0.0f), // 13
massColor,
glm::vec3(getRotatedX(angle, springMass[14], anchorPosition), getRotatedY(angle, springMass[14], anchorPosition), 0.0f), // 14
massColor,
glm::vec3(getRotatedX(angle, springMass[15], anchorPosition), getRotatedY(angle, springMass[15], anchorPosition), 0.0f), // 15
massColor,
};
ret.numVertices = NUM_ARRAY_ELEMENTS(vertices);
ret.vertices = new Vertex[ret.numVertices];
memcpy(ret.vertices, vertices, sizeof(vertices)); //memcpy(dest, source, size);
GLushort indices[] = { 0,1 ,1,2, 2,3, 3,4, 4,5, 5,6, 6,7, 7,8, 8,9, 9,10, 10,11, 11,12, 12,13, 13,14, 14,15, 15,12 };
ret.numIndices = NUM_ARRAY_ELEMENTS(indices);
ret.indices = new GLushort[ret.numIndices];
ret.connectionPoint = connectionPoint;
memcpy(ret.indices, indices, sizeof(indices));
return ret;
}
GLfloat ObjectGenerator::getRotatedX(GLfloat angle, Vertex old, glm::vec3 anchorPosition) {
GLfloat newX = (glm::cos(angle) * (old.position.x - anchorPosition.x)) - (glm::sin(angle) * (old.position.y - anchorPosition.y)) + anchorPosition.x;
return newX;
}
GLfloat ObjectGenerator::getRotatedY(GLfloat angle, Vertex old, glm::vec3 anchorPosition) {
GLfloat newY = (glm::sin(angle) * (old.position.x - anchorPosition.x)) - (glm::cos(angle) * (old.position.y - anchorPosition.y)) + anchorPosition.y;
return newY;
}