flask pdfkit sqlalchemy 通过 sql 查询从 for 循环打印到一个 pdf 文档多个模板

Question

我希望能够在一个 PDF 文档中打印多个页面，其中每个页面都是来自 for 循环中的查询的不同结果，我在不同的平台上销售，当我想打印每个销售文档时，我可以检查一个或多个框，然后单击打印和所有选择的页面都转换为一个文档，我希望能够对烧瓶做同样的事情。我的代码只打印队列中的最后一个文档，但正如您从终端打印出的每个文档所看到的那样，在此示例中要打印四个文档。

这是我目前的代码

@bp.route('/sales/factures_pdf', methods=['GET', 'POST'])
@login_required
def factures_pdf():
    addresses = Add1.query.order_by(Add1.id.desc()).filter(Add1.suivi=="0").all()
    for add in addresses:
        print(add.id, add.order_id)
        if add.erdmaddress:
            invoice = Erdmsale.query.filter(Erdmsale.id==add.erdmaddress).first()
            buyer = Erdmsale.query.filter(Erdmsale.invoice==invoice.invoice).all()
            eu = eu_poste.query.filter(eu_poste.pays==invoice.pays).first()
            if eu:
                rendered = render_template('/erdm_sales/erdm_print_facture2.html', buyer=buyer, invoice=invoice)
                pdf = pdfkit.from_string(rendered, False)

                response = make_response(pdf)
                response.headers['Content-Type'] = 'application/pdf'
                response.headers['Content-Disposition'] = 'inline; filename=Facture.pdf'


            rendered = render_template('/erdm_sales/erdm_print_facture.html', buyer=buyer, invoice=invoice)

            pdf = pdfkit.from_string(rendered, False)

            response = make_response(pdf)
            response.headers['Content-Type'] = 'application/pdf'
            response.headers['Content-Disposition'] = 'inline; filename=Facture.pdf'

        if add.bdfaddress:
            invoice = Sale.query.filter(Sale.id==add.bdfaddress).first()
            buyer = Sale.query.filter(Sale.invoice==invoice.invoice).all()
            eu = eu_poste.query.filter(eu_poste.pays==invoice.pays).first()
            if eu:
                rendered = render_template('/sales/print_facture1.html', buyer=buyer, invoice=invoice)

                pdf = pdfkit.from_string(rendered, False)

                response = make_response(pdf)
                response.headers['Content-Type'] = 'application/pdf'
                response.headers['Content-Disposition'] = 'inline; filename=Facture.pdf'

        rendered = render_template('/sales/print_facture.html', buyer=buyer, invoice=invoice)

        pdf = pdfkit.from_string(rendered, False)

        response = make_response(pdf)
        response.headers['Content-Type'] = 'application/pdf'
        response.headers['Content-Disposition'] = 'inline; filename=Facture.pdf'

    return response

这是终端输出

9139 2789695212
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[=============================>                              ] 49%\r[============================================================] 100%\rPrinting pages (2/2)          $
[>                                                           ] \rDone
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[================>                                           ] 27%\r[============================================================] 100%\rPrinting pages (2/2)          $
[>                                                           ] \rDone
9138 2791653417
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[=============================>                              ] 49%\r[============================================================] 100%\rPrinting pages (2/2)          $
[client 91.173.134.192:49218] [>                                                           ] \rDone
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[================>                                           ] 27%\r[============================================================] 100%\rPrinting pages (2/2)          $
[>                                                           ] \rDone                                                          
9135 69665725955778
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[===============>                                            ] 26%\r[============================================================] 100%\rPrinting pages (2/2)          $
[>                                                           ] \rDone
9125 07363785112922
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-www-data'
Loading page (1/2)
[>                                                           ] 0%\r[===============>                                            ] 26%\r[============================================================] 100%\rPrinting pages (2/2)          $
[>                                                           ] \rDone

如您所见，每个页面都已生成，但显示的文档是最后一页，我害怕将代码更改太多，我已尝试删除除最后一个代码之外的所有代码

                pdf = pdfkit.from_string(rendered, False)

                response = make_response(pdf)
                response.headers['Content-Type'] = 'application/pdf'
                response.headers['Content-Disposition'] = 'inline; 

但是没有生成文档。

非常感谢所有帮助。

热烈的问候

保罗

更新

作为说明，我尝试更改模板，因此只有一个模板，并制作了“response.headers”“附件”但同样的问题。

Answer 1

我花了很多时间尝试使用这段代码，但无济于事，所以我重新查看并决定我必须将 for 循环放在一个模板中，而不是放在具有四个不同模板的函数中。这是我为像我一样迷路的人准备的新代码。

@bp.route('/sales/factures_pdf', methods=['GET', 'POST'])
@login_required
def factures_pdf():
    bdfbuyers = []
    erdmbuyers = []
    eus = []
    addresses = Add1.query.order_by(Add1.id.desc()).filter(Add1.suivi=="0").all()
    for add in addresses:
        bdfinvoice = Sale.query.filter(Sale.id==add.bdfaddress).first()
        erdminvoice = Erdmsale.query.filter(Erdmsale.id==add.erdmaddress).first()
        bdfbuyer = Sale.query.filter(Sale.invoice==bdfinvoice.invoice).all() if bdfinvoice != None else 0
        erdmbuyer = Erdmsale.query.filter(Erdmsale.invoice==erdminvoice.invoice).all() if erdminvoice != None else 0
        eus.append(EU(add.Pays))
        bdfbuyers.append(bdfbuyer if bdfinvoice != None else 0)
        erdmbuyers.append(erdmbuyer if erdminvoice != None else 0)
        data = list(zip( eus, bdfbuyers, erdmbuyers))
        rendered = render_template('sales/print_factures.html', data=data, eu=eu)

        pdf = pdfkit.from_string(rendered, False)
        response = make_response(pdf)
        response.headers['Content-Type'] = 'application/pdf'
        response.headers['Content-Disposition'] = 'inline; filename=Facture.pdf'

    return response

html代码

{% for eu, bdfbuyer, erdmbuyer in data %}
    {% if bdfbuyer %}
        {% if eu %}
         <div>bdf {{ bdfbuer }}  order id : {{ bdfbuyer.invoice }} </div>
            {% for buy in bdfbuyer %}
            <div> description {{ buy.description }} </div>
            <div> date {{ buy.date }} </div>
            <div> sku {{ buy.bdf.sku }} </div>
            {% endfor %}
        {% else %}
        <div>bdf {{ bdfbuyer }}  order id : {{ bdfbuyer.invoice }} </div>
            {% for buy in bdfbuyer %}
            <div> description {{ buy.description }} </div>
            <div> date {{ buy.date }} </div>
            {% endfor %}
        {% endif %}
        <div style = "page-break-after:always;"></div>
        {% if eu %}
            {% for buy in erdmbuyer %}
            <div> description {{ buy.description }} </div>
            <div> date {{ buy.date }} </div>
            {% endfor %}
        {% else %}
            {% for buy in erdmbuyer %}
            <div> description {{ buy.description }} </div>
            <div> date {{ buy.date }} </div>
            {% endfor %}
        {% endif %}
        <div style = "page-break-after:always;"></div>
    {% endif %}
{% endfor %}

所以我决定将我所有的数据打包成“数据”，必须按照相同的顺序解包，然后使用

style = "page-break-after:always;" 

拆分页面，这是最难的部分之一。

希望这对其他人有所帮助。