我正在使用flask，flask_sqlalchemy分页函数在page1上正常工作，但在其他页面上不起作用

时间：2019-09-19 06:47:36

标签： python flask flask-sqlalchemy

我已连接到现有的 Ms Access 数据库。我的模型看起来像

gst-launch-1.0 filesrc location=Setteventi.mp4 ! qtdemux ! h264parse ! omxh264dec ! kmssink

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstKMSSink:kmssink0: display-width = 1920
/GstPipeline:pipeline0/GstKMSSink:kmssink0: display-height = 1080
/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
ERROR: from element /GstPipeline:pipeline0/GstQTDemux:qtdemux0: Internal data stream error.
Additional debug info:
qtdemux.c(6073): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:qtdemux0:
streaming stopped, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

gst-launch-1.0 uridecodebin uri=file:///root/livion_test_media/Setteventi.mp4 ! videoconvert ! autovideosink

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Got context from element 'autovideosink0': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayGBM\)\ gldisplaygbm0";
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0: source = "\(GstFileSrc\)\ source"
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:src_0: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstMultiQueuePad:sink_0: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/v4l2h264dec:v4l2h264dec0.GstPad:sink: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/v4l2h264dec:v4l2h264dec0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage.GstGhostPad:sink.GstProxyPad:proxypad1: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLUploadElement:gluploadelement0.GstPad:src: caps = video/x-raw(memory:GLMemory), format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLColorConvertElement:glcolorconvertelement0.GstPad:src: caps = video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLColorBalance:glcolorbalance0.GstPad:src: caps = video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLImageSink:sink.GstPad:sink: caps = video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLColorBalance:glcolorbalance0.GstPad:sink: caps = video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLColorConvertElement:glcolorconvertelement0.GstPad:sink: caps = video/x-raw(memory:GLMemory), format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1, texture-target=(string)2D
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage/GstGLUploadElement:gluploadelement0.GstPad:sink: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstGLImageSinkBin:autovideosink0-actual-sink-glimage.GstGhostPad:sink: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0.GstGhostPad:src_0.GstProxyPad:proxypad5: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0.GstDecodePad:src_0.GstProxyPad:proxypad4: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1

gst-launch-1.0 filesrc location=./livion_test_media/Setteventi.mp4 ! qtdemux ! h264parse ! omxh264dec ! kmssink

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: ring-buffer-max-size = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: buffer-size = -1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: buffer-duration = -1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: use-buffering = false
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: download = false
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: uri = file:///root/livion_test_media/Setteventi.mp4
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: connection-speed = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: source = "\(GstFileSrc\)\ source"
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = NULL
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:src_0: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstMultiQueuePad:sink_0: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001e67640028acd940780227e5c05a808080a0000003002000000641e30632c001000568e93b2c8bfdf8f800, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
Got context from element 'sink': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayGBM\)\ gldisplaygbm0";
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/v4l2h264dec:v4l2h264dec0.GstPad:sink: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstCapsFilter:capsfilter0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstCapsFilter:capsfilter0.GstPad:sink: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/v4l2h264dec:v4l2h264dec0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)1920, height=(int)1088, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1

在视图中，我的查询仅适用于page = 1，但是当页面大于1时（即当page = 2时）不起作用；分页查询返回所有项目，而不是20至39的项目（当page = 2，每页= 20），依此类推

class Suppliers(db.Model):

   __tablename__ = 'Suppliers'
   SupplierID = db.Column('SupplierID', db.Integer, primary_key=True)
   __table_args__ = {'autoload': True,'autoload_with': db.engine}
   def __repr__(self):
      return f"Suppliers('{self.SupplierID}', '{self.SupplierName}')"
   def as_dict(self):
      return {"SupplierID": self.SupplierID, "SupplierName": 
          self.SupplierName}

但在以下情况下无法正常工作： “ sArgs”：{“ searchString”：“ sometext”，“ searchPage”：2，“ perPage”：20，“ orderBy”：“ SupplierName”}}。

当我使用 sqlite数据库时，同样可以正常工作。 我无法在这里找到问题所在。请帮助我找到解决方案。谢谢您的宝贵时间。

1 个答案:

答案 0 :(得分：0)

我尝试使用mysql创建一个简单表，该表具有一个主键作为ID和一个名称，其中包含一些城市名称，尝试使用相同的逻辑过滤记录，并且能够完成工作，下面是相同的片段。请检查这是否可以解决您的问题，与您的代码段唯一的不同是，我提到了“ max_per_page”参数，并且我直接用like提到了实体名称和模型名称。该代码段如下所示。

queryResults = City.query.filter(City.name.like("%as%")).order_by(asc("name")).paginate(page=2, error_out=False, max_per_page=15)

完整代码段：

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import asc

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://***:***@***/***'
db = SQLAlchemy(app)

class City(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(80))

    def __init__(self, name, email):
        self.name = name

    def __repr__(self):
        return '<City Name %r>' % self.name

queryResults = City.query.filter(City.name.like("%as%")).order_by(asc("name")).paginate(page=2, error_out=False, max_per_page=15)

result = dict(datas=queryResults.items, 
                   total=queryResults.total, 
                   current_page=queryResults.page,
                   per_page=queryResults.per_page)

print(result)

输出：

{'datas': [<City Name 'Ashdod'>, <City Name 'Ashgabat'>, <City Name 'Ashikaga'>, <City Name 'Ashoknagar-Kalyangarh'>, <City Name 'Ashqelon'>, <City Name 'Asmara'>, <City Name 'Assuan'>, <City Name 'Astana'>, <City Name 'Astrahan'>, <City Name 'Asunción'>, <City Name 'Asyut'>, <City Name 'Ã\x81guas Lindas de Goiás'>, <City Name 'Bandar-e-Abbas'>, <City Name 'Banjarmasin'>, <City Name 'Barasat'>], 'total': 232, 'current_page': 2, 'per_page': 15}
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