OPENERP 构建动态视图

来自:http://shine-it.net/index.php/topic,16142.0.html

在openerp展示界面通常是通过定义class的view（xml文件）来实现的。
有时这种方法不能支持用户自定义字段的需求，于是就可以通过重写fields_view_get()、 read()来实现。
实例代码

# -*- coding: utf-8 -*-
from openerp.osv import osv,fields
from lxml import etree
from openerp import tools
from openerp.tools import to_xml

class AnalysisQuestionnaireType(osv.osv):
    _name = 'analysis.questionnaire.type'
    _description = '问卷类型'
    _columns = {
        'name': fields.char('名称', size=125, required=True),
        'analysis_set': fields.many2many('analysis.title.set', id1='analysis_questionnaire_type_id',
                                         id2='analysis_title_set_id', string='主题'),
    }

class AnalysisTitleSet(osv.osv):
    _name = "analysis.title.set"
    _description = "主题"
    _columns = {
        "name": fields.char(string="名称", size=125, required=True,),
        'analysis_questionnaire_type': fields.many2many('analysis.questionnaire.type',
                                                        id1='analysis_title_set_id',
                                                        id2='analysis_questionnaire_type_id',
                                                        string='问卷类型'),
        "analysis_title": fields.one2many('analysis.title', 'set', '题目'),
    }

class AnalysisTitle(osv.osv):
    _name = "analysis.title"
    _description = "题目"
    _columns = {
        "name": fields.char(string="名称", size=125, required=True),
        "note": fields.text("描述"),
        "set": fields.many2one("analysis.title.set", string="主题", required=True),
        'type': fields.selection([('multiple_choice_only_one_ans', '单项选择'),
                                  ('multiple_choice_multiple_ans', '多项选择'),
                                  ('matrix_of_choices_only_one_ans', '单选组合'),
                                  ('single_textbox', '单行文本框'),
                                  ('multiple_textbox', '多个单行文本框'),
                                  ('comment', '多行文本框'),
                                  ('date', '日期框'),
                                  ('date_and_time', '日期时间框'),
                                  ('descriptive_text', '描述性文本'),
                                  ('attachment', '附件'),
                                  ('image', '图片'),
                                  ], '题目类型',  required=1,),
        'is_require_answer': fields.boolean('必填项'),
        'option_id': fields.one2many('analysis.title.option', 'title_id', '备选答案'),
        'column_heading_ids': fields.one2many('analysis.title.column.heading', 'title_id', '标题'),
        'descriptive_text': fields.text('描述文本'),
    }

class AnalysisTitleOption(osv.osv):
    _name = 'analysis.title.option'
    _description = '答案选项'
    _columns = {
        'title_id': fields.many2one('analysis.title', '题目', ondelete='cascade'),
        'option': fields.char('答案选项', size=128, required=True),
        'type': fields.selection([('char', '字符型'),
                                 ('date', '日期'),
                                 ('datetime', '日期时间型'),
                                 ('integer', '整数型'),
                                 ('float', '小数型'),
                                 ('selection', '选择型')],
                                 '答案类型',
                                 required=True),

    }

class AnalysisTitleColumnHeading(osv.osv):
    _name = 'analysis.title.column.heading'
    _description = '选项标题'
    _columns = {
        'name': fields.char('选项标题', size=128, required=True),
        'title_id': fields.many2one('analysis.title', '题目', ondelete='cascade'),
    }

class AnalysisAnswer(osv.osv):
    _name = 'analysis.answer'
    _description = '答案'
    _columns = {
        'analysis_questionnaire': fields.many2one('analysis.questionnaire', '问卷'),
        'value': fields.text('值')
    }

class AnalysisQuestionnaire(osv.osv):
    _name = 'analysis.questionnaire'
    _description = '分析问卷'

    _columns = {
        "name": fields.char(string='名称', size=125, required=True),
        'type': fields.many2one('analysis.questionnaire.type', string='类型', required=True),
        'title': fields.one2many('analysis.answer', "analysis_questionnaire", "答案"),
    }

    def default_get(self, cr, uid, fields_list, context=None):
        default = super(AnalysisQuestionnaire, self).default_get(cr, uid, fields_list, context=context)
        con = context.get('type')
        default['type'] = con
        return default

    def view_init(self, cr, uid, fields_list, context=None):
        pass

    def fields_view_get(self, cr, uid, view_id=None, view_type='form', context=None, toolbar=False, submenu=False,):
        if context is None:
            context = {}
        result = super(AnalysisQuestionnaire, self).fields_view_get(cr, uid, view_id,
                                                                    view_type=view_type, context=context,
                                                                    toolbar=toolbar, submenu=submenu)
        if view_type == 'form' and context.has_key('type'):
            view = etree.fromstring(result['arch'])
            fields = result['fields']
            print etree.tostring(view)
            notebook = etree.SubElement(view, 'notebook')
            sets = self.pool.get('analysis.questionnaire.type').browse(cr, uid, context['type']).analysis_set
            q_no = 0
            for set in sets:
                page = etree.SubElement(notebook, 'page', string=set.name)
                for title in set.analysis_title:
                    q_no += 1
                    etree.SubElement(page, 'newline')
                    if title.is_require_answer:
                        etree.SubElement(page, 'separator', {'string': '*'+tools.ustr(q_no)+'.'+tools.ustr(title.name)})
                    else:
                        etree.SubElement(page, 'separator', {'string': tools.ustr(q_no)+'.'+tools.ustr(title.name)})

                    if title.type == 'multiple_choice_only_one_ans':
                        parent = etree.SubElement(page, 'group')
                        selection = []
                        for option in title.option_id:
                            selection.append((tools.ustr(option.id), option.option))
                        fields['title'+'_'+tools.ustr(title.id)+'_selection'] = {'type': 'selection',
                                                                                 'selection': selection,
                                                                                 'name': title.name}
                        etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'_selection'})
                    elif title.type == 'multiple_choice_multiple_ans':
                        parent = etree.SubElement(page, 'group', {'col': '4', 'colspan': '4'})
                        for option in title.option_id:
                            etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'-'+'option'+'_'
                                                                       + tools.ustr(option.id)})
                            fields['title'+'_'+tools.ustr(title.id)+'-'+'option'+'_'
                                   + tools.ustr(option.id)] = {'type': 'boolean', 'string': option.option}
                    elif title.type == 'matrix_of_choices_only_one_ans':
                        parent = etree.SubElement(page, 'group', {'col': '2', 'colspan': '2'})
                        selection = []
                        for option in title.option_id:
                            selection.append((tools.ustr(option.id), option.option))
                        for col in title.column_heading_ids:
                            etree.SubElement(parent, 'newline')
                            etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'
                                                                       + tools.ustr(col.id),
                                                               })
                            fields['title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'
                                   + tools.ustr(col.id)] = {'type': 'selection', 'selection': selection}
                    elif title.type == 'single_textbox':
                        parent = etree.SubElement(page, 'group',)
                        etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id) + "_single",
                                                           'nolabel': "1",
                                                           'colspan': "4"})
                        fields['title'+'_'+tools.ustr(title.id) + "_single"] = {'type': 'char', 'size': 255}
                    elif title.type == 'multiple_textbox':
                        parent = etree.SubElement(page, 'group', {'col': '4', 'colspan': '4'})
                        for col in title.column_heading_ids:
                            fields['title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'+tools.ustr(col.id)] = {'type': 'char',
                                                                                                         'size': 255}
                            etree.SubElement(parent, 'field', {'width': '300',
                                                               'colspan': '1',
                                                               'name': 'title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'
                                                                       + tools.ustr(col.id)})
                    elif title.type == 'comment':
                        parent = etree.SubElement(page, 'group')
                        etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id) + "_comment",
                                                           'nolabel': "1",
                                                           'colspan': "4"})
                        fields['title'+'_'+tools.ustr(title.id) + "_comment"] = {'type': 'text'}
                    elif title.type == 'date':
                        parent = etree.SubElement(page, 'group', {'col': '4', 'colspan': '4'})
                        for col in title.column_heading_ids:
                            fields['title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'+tools.ustr(col.id)] = {'type': 'date'}
                            etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'
                                                                       + tools.ustr(col.id)})
                    elif title.type == 'date_and_time':
                        parent = etree.SubElement(page, 'group', {'col': '4', 'colspan': '4'})
                        for col in title.column_heading_ids:
                            fields['title'+'_'+tools.ustr(title.id)+'-'
                                   + 'col'+'_'+tools.ustr(col.id)] = {'type': 'datetime'}
                            etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'-'+'col'+'_'
                                                                       + tools.ustr(col.id)})
                    elif title.type == 'attachment':
                        parent = etree.SubElement(page, 'group',)
                        fields['title'+'_'+tools.ustr(title.id)+'_attachment'] = {'type': 'binary'}
                        etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'_attachment'})
                    elif title.type == 'descriptive_text':
                        parent = etree.SubElement(page, 'group')
                        if title.descriptive_text:
                            for que_test in title.descriptive_text.split('\n'):
                                etree.SubElement(parent, 'label', {'string': to_xml(tools.ustr(que_test)),
                                                                   'align': "0.0"})
                    elif title.type == 'image':
                        parent = etree.SubElement(page, 'group',)
                        fields['title'+'_'+tools.ustr(title.id)+'_image'] = {'type': 'binary'}
                        etree.SubElement(parent, 'field', {'name': 'title'+'_'+tools.ustr(title.id)+'_image',
                                                           'widget': 'image'})
            result['arch'] = etree.tostring(view)
        return result

    def create(self, cr, uid, vals, context=None):
        answer_obj = self.pool.get("analysis.answer")
        questionnaire_vals = {'name': vals.get('name'), 'type': vals.get('type')}
        vals.pop('name', "not name")
        vals.pop('type', 'not type')
        answer_vals = {}
        questionnaire_id = super(AnalysisQuestionnaire, self).create(cr, uid, questionnaire_vals, context=context)
        answer_vals['analysis_questionnaire'] = questionnaire_id
        answer_vals['value'] = vals
        answer_obj.create(cr, uid, answer_vals, context=context)
        return questionnaire_id

    def read(self, cr, user, ids, fields=None, context=None, load='_classic_read'):
        result = super(AnalysisQuestionnaire, self).read(cr, user, ids, fields=fields, context=context, load=load)
        answer_obj = self.pool.get('analysis.answer')
        i = 0
        while i < len(result):
            answer_list = answer_obj.search(cr, user, [('analysis_questionnaire', '=', result['id'])])
            if answer_list:
                val = eval(answer_obj.read(cr, user, answer_list, ['value'], context=context)[0]['value'])
                result.update(val)
            i += 1
        return result

上述代码用户可以自己定义问卷题目及题目类型。通过fields_view_get()画出view，然后把动态构建的字段及其值通过重写create() 把数据存储到另外一个表里。这里用的是一个text字段把create返回的值直接存储起来的。当需要查看保存过的数据时，通过重写read()整理成需要的数据格式返回。